N10-005 Question #908: Real Exam Question with Answer & Explanation

The correct answer is D: Incorrect channel. When two access points operate on the same frequency and the same (or overlapping) channel, they interfere with each other, causing co-channel interference or adjacent-channel interference. This results in packet collisions, retransmissions, and intermittent connectivity. The fix

Question

A new SOHO wireless network is set up using two access points with separate SSIDs on the same frequency. However, the users are experiencing intermittent connectivity on both SSIDs. Which of the following is the problem?

Options

AWrong DNS
BSSID mismatch
CEncryption type
DIncorrect channel

Explanation

When two access points operate on the same frequency and the same (or overlapping) channel, they interfere with each other, causing co-channel interference or adjacent-channel interference. This results in packet collisions, retransmissions, and intermittent connectivity. The fix is to assign each AP a non-overlapping channel (e.g., channels 1, 6, and 11 on 2.4 GHz). DNS errors would prevent name resolution but not connectivity; SSID mismatch would prevent clients from associating entirely; encryption type mismatches would prevent authentication, not cause intermittent drops.

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