Helping You Pass Your CCNA Exams

New CCNA – Troubleshooting Questions.

November 14th, 2013 

Question 1

Refer to the exhibit:

New CCNA Troubleshooting questions.

What is the operational status of the interfaces of R2 as indicated by the command output shown?

A. One interface has a problem.
B. Two interfaces have problems.
C. The interfaces are functioning correctly.
D. The operational status of the interfaces cannot be determined from the output shown.
Answer: C

This is a tricky one, R2 se0/0 is not shown on the topology but displayed as unassigned on the exhibit.
Question 2

Refer to the exhibit:
New CCNA Troubleshooting question
Sw1 FastEthernet 0/12 port connected to another switch is configured as IEEE 802.1Q-complaint trunk with the appropriate cabling.
 Based on the output shown above, why is the trunk not formed?

A. VLANs have not been created yet.
B. An IP address must be configured for the port.
C. The port is currently configured for access mode.
D. The correct encapsulation type has not been configured.
E. The no shutdown command has not been entered for the port.
Answer: C
Study the exhibit, you will notice that the “Operational Mode” is “static access”this means the port is in access mode.
Question 3

Refer to the exhibit:
new CCNA Troubleshooting questions
The RHQ router is unable to authenticate to the RBranch router. What is the cause of the problem?

A. The usernames are incorrectly configured on the two routers.
B. The passwords do not match on the two routers.
C. CHAP authentication cannot be used on a serial interface.
D. The routers cannot be connected from interface S0/0 to interface S0/0.
E. With CHAP authentication, one router must authenticate to another router. The routers cannot be configured to authenticate to each other.
Answer: B

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

Question 4

Refer to the exhibit. 
Based on the output from RouterA, why is traffic from network unable to reach hosts in network (Choose two)

New CCNA Troubleshooting Questions

A. The cable that is connected to S0/0 on RouterA is faulty.
B. Interface S0/0 on RouterB is administratively down.
C. Interface S0/0 on RouterA is configured with an incorrect subnet mask.
D. The IP address that is configured on S0/0 of RouterB is not in the correct subnet.
E. Interface S0/0 on RouterA is not receiving a clock signal from the CSU/DSU.
F. The encapsulation that is configured on S0/0 of RouterB does not match the encapsulation that is configured on S0/0 of RouterA.
Answer: E F

The Serial0/0 of RouterA is in “status up/protocol down” state which indicates a Layer 2 problem. This can be:
Keepalives mismatch
Encapsulation mismatch
Clocking problem

Question 5
Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?
A. pingaddress
B. tracertaddress
C. tracerouteaddress
D. arpaddress
Answer: A

Question 6

Refer to the exhibit.
Router Boston and router BranchOffice are connected by their serial interfaces, but there is no connectivity between them. The Bostonrouter is known to have a correct configuration. Given the partial configurations, identify the problem on the BranchOffice router that is causing the lack of connectivity.

New CCNA Toubleshooting questions
A. transmission unit size too large
B. no loopback set
C. an incorrect subnet mask
D. incompatible encapsulation at each end
E. an incorrect IP address
F. incompatible bandwidth between routers
Answer: E
Question 7
Refer to the exhibit. 
HostA cannot ping HostB. Assuming routing is properly configured, what could be the cause of this problem?
New CCNA Troubleshooting Question
A. HostA is not on the same subnet as its default gateway.
B. The address of SwitchA is a subnet address.
C. The Fa0/0 interface on RouterA is on a subnet that can’t be used.
D. The serial interfaces of the routers are not on the same subnet.
E. The Fa0/0 interface on RouterB is using a broadcast address.
Answer: D

There is no communication between hosts on the network because their serial interface IP address does not belong to the same network.
This is where VLSM comes in once more:

Increment: 32
Network address:
Broadcast address:
Increment: 32
Network address:
Broadcast address:

Question 8
Based on the above output on RouterA, Why is the interface status showing “administratively down, line protocol down”?

A. There is no encapsulation type configured.
B. There is a mismatch in encapsulation types.
C. The interface is not receiving any keepalives. 
D. The interface has been configured with the shutdown command.
E. The interface needs to be configured as a DTE device.
F. The wrong type of cable is connected to the interface.

Answer: D



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