Cisco Exploration 1 V4.0 Final Exam

1.

Refer to the exhibit. Host B attempts to establish a TCP/IP session with host C. During this attempt, a frame was captured at the FastEthernet interface fa0/1 of the San Francisco router. The packet inside the captured frame has the source IP address 10.10.1.2, and the destination IP address is 10.31.1.20. What is the destination MAC address of the frame at the time of capture?

A.

0060.7320.D632
B.

0060.7320.D631
C.

0040.8517.44C3
D.

0009.B2E4.EE03
E.

0010.C2B4.3421

Correct Answer
A. 0060.7320.D632

Explanation
The destination MAC address of the frame at the time of capture is 0060.7320.D632.

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2.

What are three characteristics of CSMA/CD? (Choose three.)

A.

It monitors the media for presence of a data signal.
B.

After detecting a collision, hosts can resume transmission after a random timer has expired.
C.

A jam signal is used to ensure that all hosts are aware that a collision has occurred.
D.

Devices can be configured with a higher transmission priority.
E.

Data is transmitted only when the data signal is present.

Correct Answer(s)
A. It monitors the media for presence of a data signal.
B. After detecting a collision, hosts can resume transmission after a random timer has expired.
C. A jam signal is used to ensure that all hosts are aware that a collision has occurred.

Explanation
CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is a protocol used in Ethernet networks. The three characteristics of CSMA/CD mentioned in the answer are:

1. It monitors the media for the presence of a data signal: Before transmitting data, devices using CSMA/CD check if the media is busy. If a data signal is present, they wait for it to become idle before transmitting.

2. After detecting a collision, hosts can resume transmission after a random timer has expired: If two devices transmit data simultaneously and a collision occurs, they stop transmitting and wait for a random amount of time before trying again. This helps to prevent repeated collisions.

3. A jam signal is used to ensure that all hosts are aware that a collision has occurred: When a collision is detected, the devices involved send a jam signal to inform all other devices on the network that a collision has occurred. This helps to ensure that all hosts are aware of the collision and can adjust their transmission accordingly.

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3.

Refer to the exhibit. The PC, the routing table of which is displayed, is configured correctly. To which network device or interface does the IP address 192.168.1.254 belong?

A.

PC
B.

Switch
C.

Router interface fa0/0
D.

Router interface fa0/1

Correct Answer
C. Router interface fa0/0

Explanation
The IP address 192.168.1.254 belongs to the router interface fa0/0. This can be determined by looking at the routing table displayed for the PC, where the IP address is listed under the fa0/0 interface.

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4.

Refer to the exhibit. Host A wants to access the Internet. Which combination of a Layer 2 address and a Layer 3 address will enable this access from host A?

A.

Destination MAC: 0030.8596.DE83 Default gateway: 209.165.202.130
B.

Destination MAC: 0030.8596.DE82 Default gateway: 172.16.9.2
C.

Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1
D.

Destination MAC: 0030.8517.44C4 Default gateway: 209.165.202.130

Correct Answer
C. Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1

Explanation
The correct combination of a Layer 2 address and a Layer 3 address that will enable host A to access the Internet is Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1. The Layer 2 address (MAC address) is used to identify the specific network interface card (NIC) of the destination device, while the Layer 3 address (IP address) is used to identify the destination network. In this case, the MAC address is correct for the destination device, and the default gateway IP address is correct for the destination network, allowing host A to access the Internet.

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5.

What is the result of using the clock rate 56000 command at the serial interface of the router?

A.

The interface is configured as a DCE device.
B.

The interface timers are cleared.
C.

The FastEthernet interface is made to emulate a serial interface by assigning it a timing signal.
D.

The IP address for the serial interface is configured.

Correct Answer
A. The interface is configured as a DCE device.

Explanation
When the clock rate 56000 command is used at the serial interface of the router, it configures the interface as a DCE (Data Communications Equipment) device. In a serial connection, there are two types of devices, DCE and DTE (Data Terminal Equipment). The DCE device provides clocking and synchronization signals to the DTE device. By setting the interface as a DCE device with the clock rate command, the router assumes the responsibility of providing clocking signals to the connected DTE device.

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6.

Which three addresses belong to the category of public IP addresses? (Choose three.)

A.

127.0.0.1
B.

196.1.105.6
C.

132.11.9.99
D.

10.0.0.1
E.

46.1.1.97

Correct Answer(s)
B. 196.1.105.6
C. 132.11.9.99
E. 46.1.1.97

Explanation
Public IP addresses are globally unique and can be accessed over the internet. In the given options, 196.1.105.6, 132.11.9.99, and 46.1.1.97 are valid public IP addresses. These addresses can be used to identify devices on the internet and can be reached from anywhere in the world. On the other hand, 127.0.0.1 is a loopback address, which is used to test network connectivity on the local machine. 10.0.0.1 is a private IP address, typically used in local networks.

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7.

Refer to the exhibit. Which logical topology describes the exhibited network?

A.

Star
B.

Ring
C.

Point-to-point
D.

Multi-access

Correct Answer
C. Point-to-point

Explanation
The exhibited network shows a direct connection between two devices, without any other devices in between. This indicates a point-to-point topology, where each device is connected to exactly one other device.

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8.

Which statement is true about the running configuration file in a Cisco IOS device?

A.

It affects the operation of the device immediately when modified.
B.

It is stored in NVRAM.
C.

It should be deleted using the erase running-config command.
D.

It is automatically saved when the router reboots.

Correct Answer
A. It affects the operation of the device immediately when modified.

Explanation
The running configuration file in a Cisco IOS device is a file that contains the current configuration settings of the device. When this file is modified, the changes take effect immediately and affect the operation of the device. It is not stored in NVRAM, as NVRAM is used to store the startup configuration file. The running configuration file is not automatically saved when the router reboots, and it should not be deleted using the erase running-config command as it would remove the current configuration settings.

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CISCO Exploration 1 V4.0 Final Exam

What are three characteristics of CSMA/CD? (Choose three.)

Refer to the exhibit. The PC, the routing table of which is displayed, is configured correctly. To which network device or interface does the IP address 192.168.1.254 belong?

Refer to the exhibit. Host A wants to access the Internet. Which combination of a Layer 2 address and a Layer 3 address will enable this access from host A?

What is the result of using the clock rate 56000 command at the serial interface of the router?

Which three addresses belong to the category of public IP addresses? (Choose three.)

Refer to the exhibit. Which logical topology describes the exhibited network?

Which statement is true about the running configuration file in a Cisco IOS device?