The OSI model is a useful tool in troubleshooting a network because it enables y

Question

The OSI model is a useful tool in troubleshooting a network because it enables you to isolate a problem to a particular software module or piece of hardware. In this project, after reading the description of a problem, identify the OSI model layer or layers that are most likely involved.

1. You check some statistics generated by a network-monitoring program and discover that an abnormally high number of CRC errors were detected.

2. One of your servers has been exhibiting sluggish network performance. You use a network-monitoring program to try to evaluate the problem. You find considerable TCP retries occurring because the server is being overwhelmed by data, and packets are being discarded.

3. A user is trying to connect to another computer, but the logon attempt is continually rejected.

4. You try to access a Linux server to share files by using NFS. You can communicate with the server, but the shared files do not appear to be available.

5. You inspect a computer that is not able to communicate with other computers. You find that IPv6 instead of IPv4 is installed on that computer.

Explanation / Answer

1.Layer2,datalink

2.Layer4,transport

3.Layer5,session

4.Layer7,application

5.Layer3,network

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