Troubleshooting a Simple Network Flashcards
Which troubleshooting method works from the physical layer in the OSI model up to the application layer?
A. bottom-up
B. divide-and-conquer
C. top-down
D. perform comparison method
A. bottom-up
Which command can you use on Cisco network device to test if HTTPS, which listens on TCP port 443, is open?
A. ping
B. traceroute
C. show arp
D. show ip arp
E. telnet
E. telnet
Which of these methods is the most secure method of remotely accessing a network device?
A. HTTP
B. Telnet
C. SSH
D. SNMP
C. SSH
What is a symptom for excessive noise?
A. The number of CRC errors and the number of collisions are increasing.
B. The number of CRC errors is increasing and the number of collisions is constant.
C. Interface is flapping.
D. Interface is in the “administratively down” state.
B. The number of CRC errors is increasing and the number of collisions is constant.
The correct answer is “The number of CRC errors is increasing and the number of collisions is constant.” If you suspect excessive noise, the symptom of that could be number of CRC errors or rather changes in the numbers of CRC errors not related to collisions; in other words, the CRC errors could be a result of collisions, but if the number of collisions is constant, consistent, and does not change or have peaks, then the CRC errors could be caused by excessive noise.
What is the most likely cause of a high collision count in the output of the show interfaces command?
A. wrong cable type
B. duplex mismatch
C. misconfigured ACLs
D. duplicate routes
B. duplex mismatch
Which command allows you to verify duplex settings on the switch port FastEthernet 0/1?
A. show interfaces fa0/1
B. show duplex fa0/1
C. show settings fa0/1
D. show port fa0/1
A. show interfaces fa0/1
Which command is used to check interface link status?
A. show duplex
B. show interfaces
C. show interfaces speed
D. show interfaces duplex
B. show interfaces
Which troubleshooting step would you take if you wanted to check the NIC on your own device?
A. Ping the loopback address.
B. Ping the local interface.
C. Ping the default gateway.
D. Ping the remote server.
B. Ping the local interface.
Which verification method would you typically use to verify that you have a bad cable?
A. top-down method
B. bottom-up method
C. follow-the-path method
D. divide-and-conquer method
E. swap-components method
E. swap-components method
What are two possible sources of fiber media issues? (Choose two.)
A. wiring becomes damaged
B. macrobend losses
C. new EMI sources are introduced
D. traffic patterns change
C. splice losses
B. macrobend losses
C. splice losses
What are the three basic purposes of a ping test? (Choose three.)
A. test reachability
B. test RTT
C. test packet loss
D. test MTU on the path
E. test hops in the path
F. test operation system running on each hop
A. test reachability
B. test RTT
C. test packet loss
Which are three common troubleshooting approaches? (Choose three.)
A. elimination
B. divide and conquer
C. testing
D. top down
E. bottom up
F. compilation
B. divide and conquer
D. top down
E. bottom up
What is the ICMP type for the echo reply packets?
A. 1
B. 0
C. 2
D. 3
B. 0
Which option indicates errors, such as collisions, during the transmission of a frame?
A. input queue drops
B. output queue drops
C. input errors
D. output errors
D. output errors
Which troubleshooting step would you take if you wanted to check the IPv4 stack on your own device?
A. Ping the loopback address.
B. Ping the local host.
C. Ping the default gateway.
D. Ping the remote server.
A. Ping the loopback address.
