NE NE Network Troubleshooting 3

Question 1

Which tool captures and analyzes network packets at the wire level for deep inspection during troubleshooting?

Accepted Answer

Protocol analyzer (e.g., Wireshark)

Answer

Protocol analyzers like Wireshark capture raw frames from the network, decoding protocols layer by layer for detailed inspection of traffic and identification of anomalies.

Question 2

What does an 'administratively down' interface status indicate on a Cisco device?

Accepted Answer

The interface has been manually shut down with the 'shutdown' command

Answer

Administratively down means an operator used the 'shutdown' command to disable the interface; the 'no shutdown' command restores it to an active state.

Question 3

A user reports intermittent connectivity loss. Which troubleshooting technique is most useful for capturing data during the intermittent failure?

Accepted Answer

Use continuous ping and monitor interface error counters over time

Answer

Continuous pings and periodic monitoring of error counters over time can catch intermittent failures that are not present during a single snapshot test.

Question 4

What is the purpose of using 'debug ip routing' on a Cisco router during troubleshooting?

Accepted Answer

To show real-time events as routes are added or removed from the routing table

Answer

'Debug ip routing' logs routing table changes in real time, helping identify route flaps, redistribution issues, or convergence problems — use with caution on production routers.

Question 5

What does the term 'network baseline' mean in the context of troubleshooting?

Accepted Answer

A documented record of normal network performance metrics used to identify anomalies

Answer

A network baseline documents normal performance metrics (bandwidth utilization, latency, error rates) so deviations indicating problems can be quickly identified.

NE - Network Engineer Practice Test

NE - Network Engineer Practice Test

NE NE Network Troubleshooting 3