CCNA 2 V4 Chapter 8
- 1.
Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
- A.
Drop the packet
- B.
Forward the packet via the route to 10.16.1.0
- C.
Forward the packet via the route to 10.16.1.64
- D.
Use the default route
Correct Answer
D. Use the default routeExplanation
Router B will use the default route because it does not have a specific route for the destination address 10.16.1.97. The default route is used when there is no specific route available for a given destination.Rate this question:
-
- 2.
A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?
- A.
The route with the smallest AD
- B.
The route with the longest address and mask match to the destination
- C.
The route with the highest bandwidth
- D.
The route with the best combination of AD and lowest cost
Correct Answer
B. The route with the longest address and mask match to the destinationExplanation
The first criterion used to determine the best path in the routing table is the route with the longest address and mask match to the destination. This means that the router will look for the route that has the most specific match to the destination IP address. By choosing the route with the longest address and mask match, the router ensures that the packet is forwarded to the most specific network, resulting in more efficient and accurate routing.Rate this question:
-
- 3.
.Refer to the exhibit. Which statement correctly describes this network?
- A.
EIGRP is being used
- B.
There is at least one parent and one child route
- C.
192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes
- D.
Traffic going to 172.16.3.0 will be directed to s 0/0/1
Correct Answer
B. There is at least one parent and one child routeExplanation
The given network exhibits at least one parent and one child route.Rate this question:
-
- 4.
Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?
- A.
They are dropped
- B.
Sent to default gateway
- C.
Forward out interface Serial0/0/1
- D.
Forward out interface FastEthernet 0/0
Correct Answer
C. Forward out interface Serial0/0/1Explanation
When the router is issued the "ip classless" command, it means that the router is configured to forward packets to a specific interface if it has a more specific route to the destination IP address. In this case, since the destination IP address is 172.16.3.10, the router will forward the packets out of the interface Serial0/0/1.Rate this question:
-
- 5.
The following entry is displayed in the routing table: R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1 What type of route is this?
- A.
A level 1 parent route
- B.
A level 1 supernet route
- C.
A level 1 ultimate network route
- D.
A level 2 child route
- E.
A level 2 ultimate child route
Correct Answer
C. A level 1 ultimate network routeExplanation
This route is classified as a level 1 ultimate network route because it has a level 1 administrative distance and represents the ultimate network destination. The prefix 192.168.8.0/24 is being advertised through the next hop 192.168.4.1, which is reachable via the Serial0/0/1 interface. The [120/2] metric indicates that the route has an administrative distance of 120 and a metric value of 2.Rate this question:
-
- 6.
What determines if the router implements a classless route lookup process?
- A.
Child routes are present in the routing table.
- B.
A classless routing protocol has been configured on the router.
- C.
The command ip classless is enabled on the router.
- D.
Multiple routes with different masks to the same destination are in the routing table.
- E.
Routing table entries have a next-hop IP address and an exit interface for each child route.
Correct Answer
C. The command ip classless is enabled on the router.Explanation
The command "ip classless" being enabled on the router determines if the router implements a classless route lookup process. This command allows the router to perform classless routing, which means it can forward packets to subnets that are not directly connected to it. Without this command enabled, the router would only be able to forward packets to directly connected networks, which is known as classful routing. Therefore, enabling the "ip classless" command allows the router to implement a classless route lookup process.Rate this question:
-
- 7.
Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?
- A.
3
- B.
4
- C.
5
- D.
6
- E.
7
Correct Answer
E. 7Explanation
The exhibit is not provided, so it is not possible to determine the exact routes mentioned in the question. Without the exhibit, it is not possible to generate an explanation for the given correct answer.Rate this question:
-
- 8.
Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?
- A.
RIPv1
- B.
RIPv2
- C.
EIGRP
- D.
OSPF
Correct Answer
B. RIPv2Explanation
The exhibit does not provide any specific information or details about the protocol used to distribute the routing information for the network 172.16.1.4. Therefore, an explanation for why the correct answer is RIPv2 cannot be provided.Rate this question:
-
- 9.
Refer to the exhibit. What can be determined from this output?
- A.
The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24.
- B.
The parent route for these networks was removed from the routing table.
- C.
A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table.
- D.
All of the routes listed are network routes.
Correct Answer
D. All of the routes listed are network routes.Explanation
The output provided indicates that all of the routes listed in the routing table are network routes. This means that the router has specific routes for each network listed, rather than using a default route or a summarized route.Rate this question:
-
- 10.
Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched first and why?
- A.
172.16.1.0/25 because it is the first ultimate route
- B.
0.0.0.0/0 because it is the lowest network number
- C.
172.16.0.0/25 because it is the first level 1 route
- D.
172.18.0.0/15 because it has the shortest mask
Correct Answer
C. 172.16.0.0/25 because it is the first level 1 routeExplanation
The correct answer is 172.16.0.0/25 because it is the first level 1 route in the routing table. In the routing table, routes are organized in a hierarchical manner based on their level. Level 1 routes are the most specific routes and have the longest prefix length. When a packet needs to be forwarded, the router will search for a matching route starting from the most specific routes (level 1) and moving towards less specific routes. Therefore, the router will first search for a match in the level 1 route 172.16.0.0/25.Rate this question:
-
- 11.
Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown child routes of 172.16.0.0/24 will not be dropped?
- A.
Issue the ip default-network command
- B.
Use a classful routing protocol such as RIPv1
- C.
Enable either OSPF or ISIS as the routing protocol
- D.
Issue the ip classless command
- E.
Do nothing, ip classless is on by default
Correct Answer
E. Do nothing, ip classless is on by defaultExplanation
The correct answer is "do nothing, ip classless is on by default". This means that by default, the router will not drop packets for unknown child routes of the 172.16.0.0/24 network. The "ip classless" command enables the router to forward packets to a next-hop address even if the router does not have a specific route for the destination network. Therefore, there is no need for the network administrator to take any additional action in this scenario.Rate this question:
-
- 12.
Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234?
- A.
Drop the packet
- B.
Send packet out Serial 0/0/1
- C.
Send packet to network 0.0.0.0
- D.
Send packet out FastEthernet 0/0
Correct Answer
B. Send packet out Serial 0/0/1Explanation
With the "ip classless" command issued, router R2 will send the packet out Serial 0/0/1. This command allows the router to forward packets to a next-hop address even if the router does not have a specific route for the destination network. In this case, since there is no specific route for the host 172.16.4.234, the router will use the default route and send the packet out Serial 0/0/1.Rate this question:
-
- 13.
A router has the following entries in its routing table: S 192.168.0.0/24 [1/0] via 192.168.128.2 O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1 D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0 R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1 The router receives a packet that is destined for a host with the address 192.168.0.58. Which route would this router use to forward the packet?
- A.
The static route
- B.
The OSPF route
- C.
The EIGRP route
- D.
The RIP route
Correct Answer
D. The RIP routeExplanation
The router would use the RIP route to forward the packet. This is because the RIP route has the most specific matching network address (192.168.0.0/26) compared to the other routes. The router selects the route with the longest prefix match, so the RIP route with a subnet mask of /26 is more specific than the other routes with subnet masks of /24 and /25. Therefore, the router would choose the RIP route to forward the packet to the destination host with the address 192.168.0.58.Rate this question:
-
- 14.
Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?
- A.
172.16.0.0/16
- B.
172.16.0.0/24
- C.
172.16.0.0/30
- D.
172.16.1.0/16
- E.
172.16.1.0/24
Correct Answer
A. 172.16.0.0/16Explanation
The parent network that will automatically be included in the routing table when the three subnets are configured on Router1 is 172.16.0.0/16. This is because it encompasses all the other subnets mentioned in the exhibit (172.16.0.0/24, 172.16.0.0/30, 172.16.1.0/16, and 172.16.1.0/24). The /16 subnet mask indicates that the first 16 bits of the IP address are fixed, allowing for a range of IP addresses that includes all the mentioned subnets.Rate this question:
-
- 15.
Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?
- A.
0.0.0.0
- B.
255.255.0.0
- C.
255.255.255.0
- D.
255.255.255.255
Correct Answer
C. 255.255.255.0Explanation
Router1 will apply a subnet mask of 255.255.255.0 to the child routes of the 172.16.0.0/24 network. This subnet mask allows for a maximum of 256 IP addresses, with the last octet being used for host addresses. Therefore, the child routes will have a network address of 172.16.0.0 and a subnet mask of 255.255.255.0.Rate this question:
-
- 16.
Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?
- A.
Ip classless
- B.
No ip classless
- C.
Ip default-network 0.0.0.0
- D.
Ip default-gateway 172.16.254.1
- E.
Ip route 0.0.0.0 0.0.0.0 Serial 0/0/1
Correct Answer
A. Ip classlessExplanation
The command "ip classless" should be issued by the administrator to ensure that packets destined for servers on the 172.16.254.0 network are sent out the gateway of last resort, Serial 0/0/1. This command enables the router to forward packets to a default route even if the router does not have a specific route for the destination network.Rate this question:
-
- 17.
Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the routing table that matches the destination network for this packet, what does the router do next?
- A.
Searches for a default route to forward the packet
- B.
Drops the packet since the static route does not have an exit interface
- C.
Performs a recursive lookup to find the exit interface used to forward the packet
- D.
Sends a request to neighboring routers for the location of the 128.107.0.0 network
Correct Answer
C. Performs a recursive lookup to find the exit interface used to forward the packetExplanation
After finding the static route in the routing table that matches the destination network for the packet, the router performs a recursive lookup to find the exit interface used to forward the packet. This means that the router will continue to search its routing table to determine the next hop for the packet until it finds a matching route with a specific exit interface. It will repeat this process until it reaches the final destination.Rate this question:
-
- 18.
What occurs when no ip classless is implemented on the router?
- A.
The router will only support classful IP addressing.
- B.
The router will only support classful routing protocols.
- C.
The router will use a default route, if present, when a matching route is not found in the routing table.
- D.
The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.
Correct Answer
D. The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.Explanation
When no ip classless is implemented on the router, it means that the router will not support classless IP addressing. This means that the router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match. In other words, the router will not be able to dynamically determine the best route for a given destination based on the subnet mask. Instead, it will rely on the configured routes and assume it has complete knowledge of the network's subnets.Rate this question:
-
- 19.
A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?
- A.
Metric
- B.
Route prefix
- C.
Update timer
- D.
Administrative distance
Correct Answer
D. Administrative distanceExplanation
A Cisco router uses administrative distance to select the preferred route to a destination network. Administrative distance is a measure of trustworthiness or reliability assigned to different routing protocols. When multiple routing protocols provide routes to the same destination network, the router compares their administrative distances. The route with the lowest administrative distance is considered the most reliable and is chosen to be installed in the routing table.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 17, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 03, 2014Quiz Created by
In_stead
Back to top