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The network's performance has decreased dramatically on the LAN. The network administrator issues the command "show interface" on the switch and sees that the CRC errors are increasing while the number of collisions remains constant. What is most likely to be the problem?
Native VLAN mismatch.
Incorrect cable type.
Encapsulation mismatch.
Excessive noise.
Increase of CRC is usually a layer 1 problem so Encapsulation and native VLAN mismatch cannot be considered. However some cases such as Duplex/Speed mismatch can also increase the CRC errors number. Incorrect cable type connected to the interface wouldnt allow communication so that answer is incorrect. The symptom of excessive noise on the line is usually increment on CRC errors. - - - - - - - For more info, see: { http://www.zipz-services.com/skillset/Cisco-com=Troubleshoot-Ethernet(p7-12).pdf }
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