A network technician is troubleshooting severe latency and high frame retransmission rates on a 2.4 GHz wireless network within an office suite. Signal spectrum analysis reveals that three neighboring access points are broadcasting on channels 1, 2, and 3, resulting in significant adjacent-channel interference. Which of the following actions should the technician take to remediate these wireless signal issues? (Select TWO.)
- Reconfigure the wireless access points to use a non-overlapping channel deployment pattern consisting of channels 1, 6, and 11.Answer
- Ensure 2.4 GHz channel width is configured to 20 MHz rather than 40 MHz channel bonding.Answer
- CReconfigure the access switch ports connecting the APs from access mode to 802.1Q trunking mode.
- DConfigure an IP Helper address on the core router to relay DHCP requests from the wireless controller.
Answer
To resolve adjacent-channel interference in the 2.4 GHz band, the technician must reconfigure the access point channels to a non-overlapping scheme (channels 1, 6, and 11) and restrict radio channel widths to 20 MHz.
In the 2.4 GHz Wi-Fi spectrum, channels overlap significantly. Using adjacent channel assignments such as channels 1, 2, and 3 creates adjacent-channel interference (ACI), causing corrupt frames and high packet retransmission rates. Assigning non-overlapping channels (1, 6, and 11) eliminates ACI. Furthermore, maintaining a 20 MHz channel width avoids consuming excessive spectrum, preserving non-overlapping channel capacity.
Step-by-Step Solution
Key Concept
2.4 GHz Non-Overlapping Channel Planning and Channel Width Optimization