Domain 5 Network Troubleshooting

Front

Which technique used to determine the root cause of a problem involved splitting a system into smaller subprocesses for examination?

Back

Divide and conquer analysis

Answer explanation

Divid and conqure analysis technique is used to divide complex processes into small subprocesses that are easier to analyze.

Front

What is the next step in problem solving once a theory is confirmed?

Back

Establish a plan of action

Answer explanation

After a theory or hypothesis is confirmed, you should establish a plan of action to resolve the problem.

Front

What is the final step in resolving a problem?

Back

Document

Answer explanation

The documentation of findings, action, and outcomes if the final step in the rosolution of a problem.

Front

Which tool is used to troubleshoot wiring breaks in network cabling?

Back

TDR

Answer explanation

A time domain reflectometer (TDR) is a tool that sends electronic pulses of energy down a wire and reads the time it takes for their reflection to come back.

Front

You need to find a network cable that is not labeled on a wiring panel; which tool should you use to identify the cable?

Back

Tone generator

Answer explanation

A tone generator is ued in conjunction with a tracing probe to identify network cables. It operatores by injecting a wrbling tone into the cable so that the tracing probe can amplify the signal audibly.

Front

You are working along and want to test a fiber-optic cable. Which tool will help you test the fiber-optic cable quickly?

Back

Loopback adapter

Answer explanation

Although you could use a light meter to test the fiber-optic cable, you would need to move the source over to the other fiber strand. A loopback adapter will allow you to test the cable with one test of both strands. An Optical time-domain reflectometer (OTDR) is a tool used to find breaks in fiber-optic cables.

Front

Which software tool will allow you to check if a web application running on a server is online?

Back

port scanner

Answer explanation

A port scanner will allow you to check if an application is accepting connections.

Front

Which tool allows examination at the packet level for traffic from an application?

Back

Protocol analyzer

Answer explanation

A protocol analyzer will allow us to inspect packet levels of traffic that is captured from an application.

Front

You need to check the configured MTU on the interface of a Linux host; which command should you use? Options: ipconfig, ifconfig, mtuconfig, iptables

Back

ifconfig

Answer explanation

The ifconfig command will allow syou to inspect the MTU onthe interface of a Linux host.

Front

You need to check the port an application is listening on; which command should you use to view the information? Options: portqry, ifconfig, netstat, iptables

Back

netstat

Answer explanation

The netstat command will allow you to see layer 4 binding between applications and TCP/UDP ports. On windows the netstat -ab command will display listening ports.

On linux the netstat -ap command will perform the same function