Ccna2 Final Exam V2
- 1.
1. Which of the following are required when adding a network to the OSPF routing process configuration? (Choose three.)
- A.
Network address
- B.
Loopback address
- C.
Autonomous system number
- D.
Subnet mask
- E.
Wildcard mask
- F.
Area ID
Correct Answer(s)
A. Network address
E. Wildcard mask
F. Area IDExplanation
When adding a network to the OSPF routing process configuration, three things are required: the network address, the wildcard mask, and the area ID. The network address is the IP address of the network being added. The wildcard mask is used to specify which hosts or subnets should be included in the OSPF routing process. The area ID is a number that identifies the OSPF area to which the network belongs. The loopback address, autonomous system number, and subnet mask are not required for adding a network to the OSPF routing process configuration.Rate this question:
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- 2.
2. Which of the following are primary functions of a router? (Choose two.)
- A.
Packet switching
- B.
Microsegmentation
- C.
Domain name resolution
- D.
Path selection
- E.
Flow control
Correct Answer(s)
A. Packet switching
D. Path selectionExplanation
A router performs packet switching by receiving packets from different networks and forwarding them to their destination based on the destination IP address. This allows the router to efficiently route packets between networks. Additionally, a router performs path selection by determining the best path for a packet to reach its destination based on factors such as network congestion, link quality, and routing protocols. This ensures that packets are delivered in the most efficient and reliable manner possible.Rate this question:
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- 3.
3. Refer to the routing table shown in the exhibit. What is the meaning of the highlighted value 192?
- A.
It is the value assigned by the Dijkstra algorithm that designates the number of hops in the network.
- B.
It is the value used by the DUAL algorithm to determine the bandwidth for the link.
- C.
It is the metric, which is cost.
- D.
It is the administrative distance.
Correct Answer
C. It is the metric, which is cost.Explanation
The highlighted value 192 in the routing table represents the metric or cost of the route. In routing protocols, such as OSPF or EIGRP, the metric is used to determine the best path for forwarding packets. The lower the metric, the more preferred the route. In this case, a metric of 192 indicates that this route has a higher cost compared to other routes in the table.Rate this question:
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- 4.
4. Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choose three.)
- A.
The router modifies the TTL field, decrementing it by one.
- B.
The router changes the source IP to the IP of the exit interface.
- C.
The router maintains the same source and destination IP.
- D.
The router changes the source physical address to the physical address of the exit interface.
- E.
The router changes the destination IP to the IP of the exit interface.
- F.
The router sends the packet out all other interfaces, besides the one it entered the router on.
Correct Answer(s)
A. The router modifies the TTL field, decrementing it by one.
C. The router maintains the same source and destination IP.
D. The router changes the source pHysical address to the pHysical address of the exit interface.Explanation
When a packet travels through a router, the router modifies the TTL (Time to Live) field in the packet header by decrementing it by one. This is done to prevent packets from circulating endlessly in the network. The router also maintains the same source and destination IP addresses, ensuring that the packet reaches its intended destination. However, the router changes the source physical address (MAC address) to the physical address of the exit interface. This is necessary as the packet moves from one network segment to another.Rate this question:
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- 5.
5. Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?
- A.
ADC
- B.
ABC
- C.
It will load balance the traffic between ADC and ABC
- D.
It will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.
Correct Answer
C. It will load balance the traffic between ADC and ABCExplanation
The correct answer is "It will load balance the traffic between ADC and ABC." This means that the traffic from the 172.16.1.0/24 network will be distributed evenly between the ADC and ABC paths. Load balancing helps to optimize network performance by distributing traffic across multiple paths, ensuring efficient utilization of resources and improving overall network reliability.Rate this question:
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- 6.
6. What is the purpose of the TTL field within an IP packet header?
- A.
Clears an unreachable route from the routing table after the invalid timer expires
- B.
Prevents regular update messages from inappropriately reinstating a route that may have gone bad
- C.
Removes an unreachable route from the routing table after the flush timer expires
- D.
Limits the period of time or number of hops a packet can traverse through the network before it should be discarded
- E.
Used to mark the route as unreachable in a routing update that is sent to other routers
Correct Answer
D. Limits the period of time or number of hops a packet can traverse through the network before it should be discardedExplanation
The TTL (Time to Live) field within an IP packet header is used to limit the period of time or number of hops a packet can traverse through the network before it should be discarded. This helps prevent packets from circulating indefinitely in the network and ensures that they are eventually dropped if they cannot reach their destination within the specified time or hop limit.Rate this question:
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- 7.
7. Refer to the exhibit. How many routes are both level 1 and qualify for use as an ultimate route?
- A.
1
- B.
2
- C.
3
- D.
4
- E.
5
- F.
6
Correct Answer
B. 2Explanation
Based on the given exhibit, there are two routes that are both level 1 and qualify for use as an ultimate route.Rate this question:
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- 8.
8. Refer to the exhibit. Cost for each path are shown. If all routers are configured to use OSPF, what would be the path of a packet sent from Router C to Router D if Router A was down?
- A.
C-B-E-D
- B.
C-B-A-D
- C.
C-F-E-D
- D.
C-F-B-A-D
- E.
C-F-E-A-D
Correct Answer
C. C-F-E-DExplanation
If Router A is down, the packet sent from Router C to Router D would follow the path C-F-E-D. This is because Router C would first send the packet to Router F, then Router F would forward it to Router E, and finally Router E would deliver it to Router D.Rate this question:
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- 9.
9. Refer to the exhibit. Routers 1 and 2 are directly connected over a serial link. Pings are failing between the two routers. What change by the administrator will correct the problem?
- A.
Set the encapsulation on both routers to PPP.
- B.
Decrease the bandwidth on Serial 0/1/0 on router 2 to 1544.
- C.
Change the cable that connects the routers to a crossover cable.
- D.
Change the IP address on Serial 0/1/0 on router 2 to 192.168.0.1/30.
Correct Answer
D. Change the IP address on Serial 0/1/0 on router 2 to 192.168.0.1/30.Explanation
The correct answer is to change the IP address on Serial 0/1/0 on router 2 to 192.168.0.1/30. This will correct the problem because the IP addresses on both ends of a serial link must be in the same subnet in order for communication to occur. By changing the IP address on router 2 to 192.168.0.1/30, it will be in the same subnet as the IP address on router 1 (192.168.0.2/30), allowing them to communicate successfully.Rate this question:
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- 10.
10. Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?
- A.
Reboot the routers.
- B.
Change the OSPF process ID on all of the routers to 0.
- C.
Check to see if the cable is loose between ORL and JAX.
- D.
Check to see if CDP packets are passing between the routers.
- E.
Use show and debug commands to determine if hellos are propagating
Correct Answer
E. Use show and debug commands to determine if hellos are propagatingExplanation
The network administrator should use show and debug commands to determine if hellos are propagating. This step will help diagnose the issue by checking if OSPF hello packets are being sent and received correctly between the routers. If hellos are not propagating, it could indicate a problem with OSPF configuration or connectivity. By examining the output of show and debug commands, the administrator can gather more information about the OSPF process and identify any potential issues that may be causing the lack of OSPF routes in the routing table.Rate this question:
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- 11.
11. Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?
- A.
192.168.1.0/24
- B.
192.168.0.0/24
- C.
192.168.0.0/22
- D.
192.168.1.0/22
Correct Answer
C. 192.168.0.0/22Explanation
R1 should use the summarization 192.168.0.0/22 to advertise its networks to R2. This summarization includes both the networks 192.168.1.0/24 and 192.168.0.0/24, as well as additional subnets within the range 192.168.0.0/22. This allows for more efficient routing and reduces the number of routing entries that need to be maintained in R2's routing table.Rate this question:
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- 12.
12. A router boots and enters setup mode. What is the reason for this?
- A.
The IOS image is corrupt.
- B.
Cisco IOS is missing from flash memory.
- C.
The configuration file is missing from NVRAM.
- D.
The POST process has detected hardware failure.
Correct Answer
C. The configuration file is missing from NVRAM.Explanation
The reason for the router booting and entering setup mode is that the configuration file is missing from NVRAM. NVRAM (Non-Volatile Random Access Memory) is a type of memory that stores the router's configuration file. If this file is missing, the router will not be able to load the necessary settings and will enter setup mode, prompting the user to configure the router manually. This can happen if the file was accidentally deleted or if there was a failure in saving the configuration to NVRAM.Rate this question:
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- 13.
13. Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2?
- A.
R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config-router)# network 10.1.1.0 0.0.0.3 area 0
- B.
R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config)# router ospf 2 R2(config-router)# network 10.1.1.0 0.0.0.3 area 0 R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0
- C.
R2(config-router)# network 10.1.1.0 0.0.0.3 area 1 R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config-router)# network 10.0.0.0 0.0.0.3 area 1
Correct Answer
A. R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config-router)# network 10.1.1.0 0.0.0.3 area 0Explanation
The correct set of commands to configure a single area OSPF for the networks connected to R2 is "R2(config)# router ospf 1, R2(config-router)# network 192.168.2.0 0.0.0.255 area 0, R2(config-router)# network 10.1.1.0 0.0.0.3 area 0". These commands enable OSPF routing on R2, specify the networks that are connected to R2, and assign them to area 0. This ensures that R2 will participate in OSPF routing and advertise the connected networks to other OSPF routers in the network.Rate this question:
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- 14.
14. Refer to the exhibit. Routers R1 and R2 are directly connected via theirserial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency. What action should be taken to solve this problem?
- A.
Enable the serial interfaces of both routers.
- B.
Configure EIGRP to send periodic updates.
- C.
Configure the same hello interval between the routers.
- D.
Configure both routers with the same EIGRP process ID
Correct Answer
D. Configure both routers with the same EIGRP process IDExplanation
The correct answer is to configure both routers with the same EIGRP process ID. In order for routers to form an EIGRP neighbor adjacency, they must be in the same EIGRP process. By configuring both routers with the same EIGRP process ID, they will be able to recognize each other as neighbors and form an adjacency. This will allow them to exchange routing information and establish a functioning EIGRP network.Rate this question:
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- 15.
15. Refer to the exhibit. The hosts that are connected to R2 are unable to ping the hosts that are connected to R1. How can this problem be resolved?
- A.
Configure the router ID on both routers.
- B.
Configure the R2 router interfaces for area 0.
- C.
Configure a loopback interface on both routers.
- D.
Configure the proper subnet masks on the router interfaces.
Correct Answer
B. Configure the R2 router interfaces for area 0.Explanation
Configuring the R2 router interfaces for area 0 will resolve the problem because it will ensure that both routers are in the same OSPF area. OSPF uses areas to divide the network into smaller, more manageable units. By configuring the R2 router interfaces for area 0, the hosts connected to R2 will be able to establish OSPF neighbor relationships with the hosts connected to R1, allowing them to exchange routing information and enabling successful pings between the hosts.Rate this question:
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- 16.
16. In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this network?
- A.
D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0
- B.
O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0
- C.
R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0
- D.
I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/0
Correct Answer
A. D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0Explanation
The answer is D because it has the lowest administrative distance (90) compared to the other routes. Administrative distance is a measure of the trustworthiness of the source of the route information. The lower the administrative distance, the more reliable the source. In this case, the route learned through dynamic routing process D is considered the most reliable and will be used to reach the network 172.16.1.0.Rate this question:
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- 17.
17. Which statement is true about the metrics used by routing protocols?
- A.
A metric is a value used by a particular routing protocol to compare paths to remote networks.
- B.
A common metric is used by all routing protocols.
- C.
The metric with the highest value is installed in the routing table.
- D.
The router may use only one parameter at a time to calculate the metric
Correct Answer
A. A metric is a value used by a particular routing protocol to compare paths to remote networks.Explanation
A metric is a value used by a particular routing protocol to compare paths to remote networks. This means that routing protocols use metrics to determine the best path for data to travel from one network to another. Each routing protocol may use its own metric calculation method, such as hop count, bandwidth, or delay, to evaluate the paths and select the most optimal one. The metric helps the router make informed decisions about the paths it should take to forward data packets efficiently.Rate this question:
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- 18.
20. Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1. What could be the cause of this problem?
- A.
The FastEthernet interface on R1 is disabled.
- B.
Autosummarization is enabled on R1.
- C.
The serial interface S0/0/0 of R1 is administratively down.
- D.
No static route or routing protocol is configured.
Correct Answer
D. No static route or routing protocol is configured.Explanation
The given exhibit states that hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The question asks for the possible cause of this problem. The correct answer is "No static route or routing protocol is configured." This means that R1 does not have any specific routes defined for the 172.16.1.0 network, which is why the communication is failing. Without a static route or routing protocol, R1 does not know how to reach the 172.16.1.0 network.Rate this question:
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- 19.
21. Which statement correctly describes a feature of RIP?
- A.
RIP is a link-state routing protocol.
- B.
RIP uses only one metric—hop count— for path selection.
- C.
Advertised routes with hop counts greater than 10 are unreachable.
- D.
Messages are broadcast every 10 seconds
Correct Answer
B. RIP uses only one metric—hop count— for path selection.Explanation
RIP (Routing Information Protocol) uses hop count as its metric for path selection. This means that RIP measures the distance between routers in terms of the number of hops or routers that a packet must traverse to reach its destination. RIP selects the path with the fewest number of hops as the best route. Other routing protocols may consider additional factors such as bandwidth or delay, but RIP solely relies on hop count. Therefore, the statement that correctly describes a feature of RIP is that it uses only one metric, hop count, for path selection.Rate this question:
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- 20.
22. Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)
- A.
All routes are stable.
- B.
Each route has one feasible successor.
- C.
The serial interface between the two routers is down.
- D.
The administrative distance of EIGRP has been set to 50.
- E.
The show ip eigrp topology command has been run on R1.
Correct Answer(s)
A. All routes are stable.
E. The show ip eigrp topology command has been run on R1.Explanation
The exhibit shows the output of the "show ip eigrp topology" command on R1. Since the exhibit does not provide any information about the stability of the routes or the feasibility successors, we cannot determine if the first two statements are true. However, we can determine that the command has been run on R1 because the output is shown in the exhibit. Therefore, the correct statements are "All routes are stable" and "The show ip eigrp topology command has been run on R1."Rate this question:
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- 21.
23. A network administrator is analyzing routing update behavior on a network that has both EIGRP and OSPF configured on all routers. Both protocols appear in the output of show ip protocols. However, only EIGRP internal routes appear in the routing tables. Which statement correctly explains the scenario?
- A.
The OSPF protocol has a higher cost than EIGRP.
- B.
The EIGRP protocol has a lower metric than OSPF.
- C.
The EIGRP protocol was configured first on the router.
- D.
The EIGRP protocol has a lower administrative distance than OSPF
Correct Answer
D. The EIGRP protocol has a lower administrative distance than OSPFExplanation
The EIGRP protocol has a lower administrative distance than OSPF. Administrative distance is a measure of the trustworthiness of a routing protocol. When multiple routing protocols are configured on a router, the protocol with the lowest administrative distance is preferred and its routes are added to the routing table. In this scenario, although both EIGRP and OSPF are configured, only EIGRP internal routes appear in the routing tables. This suggests that EIGRP has a lower administrative distance than OSPF, making it the preferred routing protocol.Rate this question:
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- 22.
24. Which prompt is used to allow a user to change the IP address of an interface on a router?
- A.
Router>
- B.
Router#
- C.
Router(config)#
- D.
Router(config-if)#
Correct Answer
D. Router(config-if)#Explanation
The correct answer is "Router(config-if)#". This prompt is used to access the interface configuration mode on a router, where the user can make changes to the IP address of a specific interface. The "config-if" stands for configuration interface, indicating that any changes made in this mode will only affect the selected interface rather than the entire router.Rate this question:
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- 23.
25. Refer to the exhibit. Routers RTRA and RTRB are running OSPF. What entry does RTRA add in the routing table when Serial 0/0/0 receives an update about the network that is attached to RTRB?
- A.
O 172.16.7.0/30 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0
- B.
O 172.16.7.16/28 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0
- C.
O 172.16.7.0/24 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0
- D.
O 172.16.0.0/16 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0
Correct Answer
B. O 172.16.7.16/28 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0Explanation
When Serial 0/0/0 receives an update about the network that is attached to RTRB, RTRA adds the entry "O 172.16.7.16/28 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0" in its routing table. This means that RTRA has learned about the network 172.16.7.16/28 from RTRB and the next hop to reach that network is 10.10.10.2 via the Serial0/0/0 interface. The administrative distance is 110 and the metric is 51. The timestamp indicates when the update was received.Rate this question:
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- 24.
26. Which additional piece of information is included in the updates of classless routing protocols to support the use of VLSM and discontiguous networks?
- A.
Metric
- B.
Network mask
- C.
Neighbor router ID
- D.
Administrative distance
Correct Answer
B. Network maskExplanation
Classless routing protocols, such as OSPF and RIP version 2, support Variable Length Subnet Masking (VLSM) and discontiguous networks. VLSM allows for the creation of subnets with different subnet mask lengths within a network. The network mask is an additional piece of information included in the updates of classless routing protocols to indicate the subnet mask being used for a particular network. This information is necessary for routers to accurately determine the network boundaries and make routing decisions based on the destination IP address and its corresponding subnet mask.Rate this question:
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- 25.
27. Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static route entry be altered to accommodate a topology change?
- A.
Keep the existing static route and configure a new static route with the correct next hop IP address.
- B.
Negate the existing static route and configure a new static route with the correct next hop IP address.
- C.
Do nothing. The existing static route will automatically update the next hop entry with the new IP address.
- D.
Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP address
Correct Answer
B. Negate the existing static route and configure a new static route with the correct next hop IP address.Explanation
When a topology change occurs, the existing static route must be negated because it is no longer valid. By negating the existing static route, it is effectively removed from the routing table. Then, a new static route can be configured with the correct next hop IP address to accommodate the topology change. This ensures that the router will use the correct path to reach the destination network.Rate this question:
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- 26.
28. Which router mode is accessed by entering the enable command?
- A.
User EXEC
- B.
Privileged EXEC
- C.
Global configuration
- D.
Interface configuration
Correct Answer
B. Privileged EXECExplanation
The correct answer is privileged EXEC. When the enable command is entered, it allows the user to access the privileged EXEC mode on a router. In this mode, the user has access to all the router's commands and can make configuration changes, view system information, and perform administrative tasks. This mode provides a higher level of control and access compared to the user EXEC mode.Rate this question:
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- 27.
29. Refer to the exhibit. An administrator is attempting to configure a router by copying and pasting the commands that are shown in the exhibit. However, only one of the FastEthernet interfaces is coming up. What is the problem?
- A.
Both interfaces are in the same IP subnet.
- B.
FastEthernet0/1 does not have a description.
- C.
There can be only one FastEthernet interface enabled on a router at one time.
- D.
The administrator did not exit to global configuration mode before configuring FastEthernet0/1
Correct Answer
A. Both interfaces are in the same IP subnet.Explanation
The problem is that both interfaces are in the same IP subnet. This means that they have overlapping IP addresses, which can cause conflicts and prevent both interfaces from coming up. Each interface on a router should be assigned a unique IP address within its own subnet.Rate this question:
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- 28.
30. In an examination of two OSPF routers that fail to exchange information, it is determined that they have not become OSPF neighbors. Which two configuration values must match for the OSPF routers to become neighbors?
- A.
Neighbor ID and router ID
- B.
Dead time and hello time
- C.
OSPF area and neighbor ID
- D.
OSPF area and interface priority
Correct Answer
B. Dead time and hello timeExplanation
The correct answer is "dead time and hello time". In OSPF, routers exchange hello packets to establish and maintain neighbor relationships. The hello time is the interval between these hello packets, while the dead time is the duration of time that can pass without receiving a hello packet before considering the neighbor to be down. For two routers to become OSPF neighbors, their dead time and hello time configuration values must match. If these values do not match, the routers will not recognize each other as neighbors and will not exchange information.Rate this question:
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- 29.
31. Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols. Which path will be used to transmit the data packets from PC1 to PC2?
- A.
The packets will travel via R2-R1.
- B.
The packets will travel via R2-R3.
- C.
The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.
- D.
The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path
Correct Answer
A. The packets will travel via R2-R1.Explanation
Based on the information provided, the question states that routers R1 and R3 use different routing protocols with default administrative distance values. It also mentions that the destination network is advertised by both protocols. Therefore, in this scenario, the packets will travel via R2-R1, indicating that the path through R2 and R1 will be used to transmit the data packets from PC1 to PC2.Rate this question:
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- 30.
32. Refer to the exhibit. The network administrator has run the following command on R1. R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2 What is the result of running this command?
- A.
Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.
- B.
This route is automatically propagated throughout the entire network.
- C.
Traffic for all networks is forwarded to 172.16.1.2.
- D.
The command invokes a dynamic routing protocol for 192.168.2.0
Correct Answer
A. Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.Explanation
The command "ip route 192.168.2.0 255.255.255.0 172.16.1.2" on R1 configures a static route. It specifies that any traffic destined for the network 192.168.2.0 with a subnet mask of 255.255.255.0 should be forwarded to the next hop address 172.16.1.2. Therefore, the result of running this command is that traffic for network 192.168.2.0 will be forwarded to 172.16.1.2.Rate this question:
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- 31.
33. Why is fast convergence desirable in networks that use dynamic routing protocols?
- A.
Hosts are unable to access their gateway until the network is converged.
- B.
Routers will not allow packets to be forwarded until the network is converged.
- C.
Routers may make incorrect forwarding decisions until the network has converged.
- D.
Routers will not allow configuration changes to be made until the network has converged
Correct Answer
C. Routers may make incorrect forwarding decisions until the network has converged.Explanation
Fast convergence is desirable in networks that use dynamic routing protocols because routers may make incorrect forwarding decisions until the network has converged. Convergence refers to the process of all routers in the network agreeing on the best path for forwarding packets. During the convergence process, routers may have inconsistent routing tables, leading to potential incorrect forwarding decisions. Fast convergence minimizes the time it takes for routers to reach a consistent state, reducing the chances of incorrect forwarding and improving network performance and reliability.Rate this question:
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- 32.
34. Which two statements about routing protocols are accurate? (Choose two.)
- A.
OSPF supports VLSM.
- B.
RIPv1 supports VLSM.
- C.
RIPv2 does not have a hop count limit.
- D.
EIGRP supports discontiguous network designs.
- E.
RIPv2 does not support discontiguous network designs
Correct Answer(s)
A. OSPF supports VLSM.
D. EIGRP supports discontiguous network designs.Explanation
OSPF supports VLSM, which stands for Variable Length Subnet Masking. This means that OSPF can handle networks with different subnet mask lengths, allowing for more efficient use of IP addresses. EIGRP supports discontiguous network designs, meaning that it can route traffic between non-contiguous networks. This is useful in situations where networks are physically separated but still need to communicate with each other.Rate this question:
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- 33.
35. Refer to the exhibit. If the EIGRP routing protocol is used throughout the network, which IP address and mask prefix should be sent by router R1 to the Edge router as a result of manual summarization of LANs A, B, C, and D?
- A.
192.168.4.0/20
- B.
192.168.4.0/22
- C.
192.168.4.0/24
- D.
192.168.4.0/26
Correct Answer
B. 192.168.4.0/22Explanation
Router R1 should send the IP address and mask prefix 192.168.4.0/22 to the Edge router as a result of manual summarization of LANs A, B, C, and D. This means that R1 will aggregate the IP addresses of LANs A, B, C, and D into a single network address with a /22 subnet mask. This will allow for more efficient routing and reduce the size of the routing table on the Edge router.Rate this question:
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- 34.
36. Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?
- A.
RIP
- B.
RIPv2
- C.
EIGRP
- D.
Static routes
Correct Answer
D. Static routesExplanation
The most efficient solution for forwarding traffic between BR and HQ would be to use static routes. Static routes allow for manual configuration of the routing table, eliminating the need for the router to constantly update and maintain routing information. This reduces the strain on router resources and provides a more efficient use of those resources compared to dynamic routing protocols like RIP, RIPv2, and EIGRP, which require continuous updates and calculations to determine the best path for forwarding traffic.Rate this question:
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- 35.
37. Refer to the exhibit. The network is configured with RIPv2. However, network administrators notice that communication cannot be successfully completed from one LAN to another. A network administrator issues the show ip route command on the HQ router. Based on the output, what should be done to correct the problem?
- A.
Disable the load balancing feature of RIPv2.
- B.
Issue the no auto-summary command for RIPv2.
- C.
Replace RIPv2 with EIGRP which supports VLSM.
- D.
Make sure that the network statements include the correct subnet mask
Correct Answer
B. Issue the no auto-summary command for RIPv2.Explanation
Based on the output of the "show ip route" command, the correct answer is to issue the "no auto-summary" command for RIPv2. This is because the output shows that the network is not correctly summarizing the routes, which can lead to communication issues between LANs. By disabling the auto-summary feature, RIPv2 will advertise the more specific subnets and allow for successful communication between LANs.Rate this question:
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- 36.
38. Which protocol is used by EIGRP to deliver and receive update packets?
- A.
FTP
- B.
RTP
- C.
TCP
- D.
TFTP
- E.
UDP
Correct Answer
B. RTP -
- 37.
39. Which multicast address does EIGRP use to send hello and updates packets?
- A.
224.0.0.5
- B.
224.0.0.6
- C.
224.0.0.9
- D.
224.0.0.10
Correct Answer
D. 224.0.0.10Explanation
EIGRP uses the multicast address 224.0.0.10 to send hello and update packets. Multicast addresses are used to send packets to a group of devices rather than a single destination. In this case, EIGRP uses the multicast address 224.0.0.10 to send these packets to all routers in the network that are running EIGRP. This allows for efficient communication and updates between routers in the EIGRP routing domain.Rate this question:
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- 38.
40. A network administrator is using an application that is monitoring packets on the network and sees an EIGRP update packet. What is the purpose of the update packet?
- A.
The packet is sent to discover neighbors within the EIGRP network.
- B.
The packet is sent to search for network devices within an EIGRP network.
- C.
The packet is used to propagate routing information within the EIGRP network.
- D.
The packet is used to send an unreachable reply to another router within the EIGRP network.
- E.
The packet is used to notify all routers that EIRGP has failed on one of the routers within the EIGRP network
Correct Answer
C. The packet is used to propagate routing information within the EIGRP network.Explanation
The EIGRP update packet is used to propagate routing information within the EIGRP network. This means that when a router has new or updated routing information, it will send an update packet to its neighboring routers to inform them of the changes. This allows all routers within the EIGRP network to have consistent and up-to-date routing tables, ensuring efficient and reliable routing throughout the network.Rate this question:
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- 39.
41. Refer to the exhibit. What OSPF network statements are required for the router B to advertise the three networks that are attached?
- A.
Router ospf 1 network 10.0.0.0 0.0.0.255 area 0
- B.
Router ospf 1 network 10.1.1.0 0.3.255.255 area 0 network 10.10.1.0 0.255.255.255 area 0 network 10.20.1.0 0.255.255.255 area 0
- C.
Router ospf 1 network 10.1.1.0 0.0.0.3 area 0 network 10.10.1.0 0.0.255.255 area 0 network 10.20.1.0 0.0.255.255 area 0
- D.
Router ospf 1 network 10.1.1.0 0.0.0.3 area 0 network 10.10.1.0 0.0.0.255 area 0 network 10.20.1.0 0.0.0.255 area 0
Correct Answer
D. Router ospf 1 network 10.1.1.0 0.0.0.3 area 0 network 10.10.1.0 0.0.0.255 area 0 network 10.20.1.0 0.0.0.255 area 0Explanation
The correct answer is "router ospf 1 network 10.1.1.0 0.0.0.3 area 0 network 10.10.1.0 0.0.0.255 area 0 network 10.20.1.0 0.0.0.255 area 0". This answer is correct because it includes the correct network statements that match the three networks attached to router B. The network statement "10.1.1.0 0.0.0.3" matches the network 10.1.1.0/30, the network statement "10.10.1.0 0.0.0.255" matches the network 10.10.1.0/24, and the network statement "10.20.1.0 0.0.0.255" matches the network 10.20.1.0/24. By including these network statements, router B will advertise these three networks to other OSPF routers in area 0.Rate this question:
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- 40.
42. Refer to the exhibit. Why is the state of the serial0/0/0 interface administratively down?
- A.
An IP address has not been configured on the interface.
- B.
The WIC was installed into the incorrect slot on the router.
- C.
The default encapsulation on the interface has been modified.
- D.
The no shutdown command has not been executed on the interface
Correct Answer
D. The no shutdown command has not been executed on the interfaceExplanation
The state of the serial0/0/0 interface is administratively down because the "no shutdown" command has not been executed on the interface. This command is used to enable the interface and bring it up. Without executing this command, the interface remains administratively down and cannot transmit or receive data.Rate this question:
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- 41.
43. On a router, which three components are stored in RAM? (Choose three.)
- A.
POST code
- B.
The routing table
- C.
The running-configuration
- D.
The start-up configuration
- E.
The bootstrap instructions
- F.
A copy of the operating system
Correct Answer(s)
B. The routing table
C. The running-configuration
F. A copy of the operating systemExplanation
In a router, three components that are stored in RAM are the routing table, the running-configuration, and a copy of the operating system. The routing table is stored in RAM to determine the best path for forwarding packets. The running-configuration is also stored in RAM and contains the current configuration settings of the router. A copy of the operating system is stored in RAM to ensure that the router can function properly. These components need to be stored in RAM for quick access and efficient operation of the router.Rate this question:
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- 42.
44. Refer to the exhibit. RouterA and RouterB cannot successfully exchange EIGRP routes. What is the problem?
- A.
The hello intervals do not match.
- B.
The autonomous system numbers do not match.
- C.
The no auto-summary command is missing from both routers.
- D.
The ip bandwidth-percent command is missing from RouterB
Correct Answer
B. The autonomous system numbers do not match.Explanation
The problem in this scenario is that the autonomous system numbers do not match between RouterA and RouterB. EIGRP uses autonomous system numbers to identify and differentiate between different EIGRP routing domains. In order for routers to exchange EIGRP routes successfully, they must be configured with the same autonomous system number.Rate this question:
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- 43.
45. Refer to the exhibit. What is the purpose of the ip bandwidth-percent eigrp 50 10 command?
- A.
To limit the bandwidth EIGRP packets can use to 6.4 kb/s
- B.
To limit the bandwidth EIGRP packets can use to 10 kb/s
- C.
To limit the bandwidth EIGRP packets can use to 32 kb/s
- D.
To limit the bandwidth EIGRP packets can use to 50 kb/s
Correct Answer
A. To limit the bandwidth EIGRP packets can use to 6.4 kb/sExplanation
The purpose of the "ip bandwidth-percent eigrp 50 10" command is to limit the bandwidth that EIGRP packets can use to 6.4 kb/s.Rate this question:
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- 44.
46. A network administrator adds the default-information originate command to the configuration of a router that uses RIP as the routing protocol. What will result from adding this command?
- A.
The router will be reset to the default factory information.
- B.
The router will not forward routing information that is learned from other routers.
- C.
The router will propagate a static default route in its RIP updates, if one is present.
- D.
The router will only forward packets that originate on directly connected networks
Correct Answer
C. The router will propagate a static default route in its RIP updates, if one is present.Explanation
By adding the "default-information originate" command to the router's configuration, it will propagate a static default route in its RIP updates, but only if one is present. This means that if the router has a static default route configured, it will advertise this route to other routers using RIP. This allows the router to provide a default gateway to other routers in the network, enabling them to forward packets to destinations outside of their own network.Rate this question:
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- 45.
47. A network technician is configuring a Cisco 2811 router. The technician types conf at the privileged level command prompt and presses the TAB key. What action will the router take?
- A.
It will revert to the user mode.
- B.
It will perform an auto-complete function.
- C.
It will go into the global configuration mode.
- D.
It will give an error message that indicates a bad command was entered
Correct Answer
B. It will perform an auto-complete function.Explanation
When the network technician types "conf" and presses the TAB key, the Cisco 2811 router will perform an auto-complete function. This means that the router will automatically complete the command or suggest possible commands that start with "conf" to assist the technician in entering the correct command. This feature helps to save time and reduce the chances of errors when configuring the router.Rate this question:
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- 46.
48. What is a function of the console port on a router?
- A.
It is used to manage the router.
- B.
It is used for packet receiving and forwarding.
- C.
It is used to interconnect various types of LANs.
- D.
It is used to interconnect a variety of serial links including T1, DSL, and ISDN
Correct Answer
A. It is used to manage the router.Explanation
The console port on a router is used to manage the router. This port allows administrators to connect directly to the router using a console cable and a terminal emulation program. Through the console port, administrators can access the router's command-line interface (CLI) and configure various settings, monitor network performance, troubleshoot issues, and perform other administrative tasks. It provides a direct and secure method of accessing and managing the router's configuration and operations.Rate this question:
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- 47.
49. Refer to the exhibit. Which route will be installed in the routing table on R1 to forward traffic from PC1 to the web server?
- A.
The static route
- B.
The route learned via OSPF
- C.
The route learned via EIGRP
- D.
Both routes learned via OSPF and EIGRP
Correct Answer
A. The static routeExplanation
The correct answer is the static route. This means that R1 will use a manually configured static route to forward traffic from PC1 to the web server, rather than relying on any dynamically learned routes from OSPF or EIGRP.Rate this question:
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- 48.
50. Refer to the exhibit. After the commands are entered, which password will be required to establish a Telnet session with the router?
- A.
Cisco
- B.
Letmein
- C.
Please
- D.
Access
Correct Answer
D. AccessExplanation
After the commands are entered, the password "access" will be required to establish a Telnet session with the router.Rate this question:
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- 49.
17. Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undefined. R1 can ping 192.168.2.1 and 10.1.1.2, but is unable to ping 192.168.4.1. What is the reason for the ping failure?
- A.
The serial interface between two routers is down.
- B.
R2 is not forwarding the routing updates.
- C.
The 192.168.4.0 network is not included in the RIP configuration of R2.
- D.
RIPv1 needs to be configured.
Correct Answer
C. The 192.168.4.0 network is not included in the RIP configuration of R2.Explanation
The reason for the ping failure is that the 192.168.4.0 network is not included in the RIP configuration of R2. Since R1 is using RIPv2 and static routes are undefined, it relies on the RIP configuration to learn about networks. Since R2 does not have the 192.168.4.0 network included in its RIP configuration, R1 is unaware of this network and therefore cannot ping 192.168.4.1.Rate this question:
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- 50.
19. Which two statements are true about the EIGRP successor route? (Choose two.)
- A.
It is saved in the topology table for use if the primary route fails.
- B.
It may be backed up by a feasible successor route.
- C.
It is used by EIGRP to forward traffic to the destination.
- D.
It is flagged as active in the routing table.
- E.
After the discovery process has occurred, the successor route is stored in the neighbor table
Correct Answer(s)
B. It may be backed up by a feasible successor route.
C. It is used by EIGRP to forward traffic to the destination.Explanation
The EIGRP successor route may be backed up by a feasible successor route, which provides a backup path in case the primary route fails. Additionally, the successor route is used by EIGRP to forward traffic to the destination, making it the preferred route for sending data packets.Rate this question:
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Mar 21, 2023Quiz Edited by
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Jun 11, 2013Quiz Created by
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