The Ideal Quiz On CCNA – Troubleshooting

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Quizzes Created: 12 | Total Attempts: 46,441
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1. Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?

Explanation

The correct answer is "pingaddress". The ping command is used to verify connectivity between hosts on the same LAN. It sends an ICMP echo request to the specified address and waits for an ICMP echo reply. If a reply is received, it indicates that there is connectivity between the two hosts.

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About This Quiz
The Ideal Quiz On CCNA  Troubleshooting - Quiz

The Cisco Certified Network Associate is a tremendous tool that allows people the chance to learn all the knowledge required to work in any field regarding compute networking, and this quiz aims to help you along your journey to achieving it. Today we’ll be looking at the topic of troubleshooting!

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2. What is the reason that the interface status is "administratively down, line protocol down"?

Explanation

The reason that the interface status is "administratively down, line protocol down" is because the interface has been configured with the shutdown command. This command effectively disables the interface and prevents it from functioning.

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3. Refer to the exhibit:Assuming that the entire network topology is shown, what is the operational status of the interfaces of R2 as indicated by the command output shown?

Explanation

Based on the given command output, all interfaces of R2 are shown as "up" and "up/up" which indicates that they are functioning correctly. There are no error messages or indications of any problems with the interfaces. Therefore, the correct answer is that the interfaces are functioning correctly.

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4. Two routers named Atlanta and Brevard are connected by their serial interfaces as illustrated, but there is no connectivity between them. The Atlanta router is known to have a correct configuration. Given the partial configurations, identify the problem on the Brevard router that is causing the lack of connectivity.

Explanation

The lack of connectivity between the Atlanta and Brevard routers is caused by an incorrect IP address on the Brevard router. This means that the IP address configured on the Brevard router is not compatible with the network it is connected to, resulting in the lack of connectivity between the two routers.

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5. Refer to the exhibit:Switch port FastEthernet 0/24 on AlSwitch1 will be used to create an IEEE 802.1Q-complaint trunk to another switch. Based on the output shown, What is the reason the trunk does not form, even thought the proper cabling has been attached?

Explanation

The “Operational Mode” is “static access” so this port is currently in access mode.

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6. Refer to the exhibit. A network administrator configures a new router and enters the copy startup-config running-config on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enter the system configuration dialog as shown. What is the cause of the problem?

Explanation

The “System Configuration Dialog” appears only when no startup configuration file is found. The network administrator has made a mistake because the command “copy startup-config running-config” will copy the startup config (which is empty) over the running config (which is configured by the administrator). So everything configured was deleted.

Note: We can tell the router to ignore the start-up configuration on the next reload by setting the register to 0×2142. This will make the “System Configuration Dialog” appear at the next reload.

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7. Refer to the exhibit. HostA cannot ping HostB. Assuming routing is properly configured, what could be the cause of this problem?

Explanation

Now let’s find out the range of the networks on serial link:

For the network 192.168.1.62/27:

Increment: 32
Network address: 192.168.1.32
Broadcast address: 192.168.1.63

For the network 192.168.1.65/27:

Increment: 32
Network address: 192.168.1.64
Broadcast address: 192.168.1.95

-> These two IP addresses don’t belong to the same network and they can’t see each other -> D is the correct answer.

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8. Refer to the exhibit:The Bigtime router is unable to authenticate to the Littletime router. What is the cause of the problem?

Explanation

Both routers must use the same password for CHAP to authentication.

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9. Refer to the exhibit. Hosts in network 192.168.2.0 are unable to reach hosts in network 192.168.3.0. Based on the output from RouterA, what are two possible reasons for the failure? (Choose two)

Explanation

From the output we see the Serial0/0 of RouterA is in “status up/protocol down” state which indicates a Layer 2 problem so the problem can be:

+ Keepalives mismatch
+ Encapsulation mismatch
+ Clocking problem

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Which command can be used from a PC to verify the connectivity between...
What is the reason that the interface status is "administratively...
Refer to the exhibit:Assuming that the entire network topology is...
Two routers named Atlanta and Brevard are connected by their serial...
Refer to the exhibit:Switch port FastEthernet 0/24 on AlSwitch1 will...
Refer to the exhibit. A network administrator configures a new router...
Refer to the exhibit. HostA cannot ping HostB. Assuming routing is...
Refer to the exhibit:The Bigtime router is unable to authenticate to...
Refer to the exhibit. Hosts in network 192.168.2.0 are unable to reach...
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