N10-005 · Question #954
In a newly installed LAN, the network administrator receives many calls about intermittent or slow connectivity to the authentication server. Which of the following could cause this problem? (Select…
The correct answer is C. Cable crosstalk E. EMI. Cable crosstalk (C) occurs when electrical signals from one wire pair bleed into adjacent pairs within the same cable bundle, causing data corruption and retransmissions that lead to intermittent or slow connectivity. EMI (E) - Electromagnetic Interference - from motors…
Question
In a newly installed LAN, the network administrator receives many calls about intermittent or slow connectivity to the authentication server. Which of the following could cause this problem? (Select TWO).
Options
- AVLAN configuration error
- BCables too short
- CCable crosstalk
- DIncorrect channel
- EEMI
- FWrong subnet mask
How the community answered
(14 responses)- B7% (1)
- C79% (11)
- D14% (2)
Explanation
Cable crosstalk (C) occurs when electrical signals from one wire pair bleed into adjacent pairs within the same cable bundle, causing data corruption and retransmissions that lead to intermittent or slow connectivity. EMI (E) - Electromagnetic Interference - from motors, fluorescent lights, or other electrical equipment induces noise on copper network cables, degrading signal quality and causing the same symptoms. Both are physical-layer issues that result in packet errors and retransmissions without a complete link failure. Cables being 'too short' is not a real networking problem, incorrect channel applies to wireless, VLAN errors and wrong subnet masks typically cause complete connectivity failures rather than intermittent slowness.
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