350-401 · Question #538
What is a characteristic of Wi-Fi channels?
The correct answer is B. Devices that connect to the same Wi-Fi channel reside in the same collision domain.. Within Wi-Fi networks, all devices connected to the same channel operate within a single collision domain, as they share the same half-duplex medium.
Question
What is a characteristic of Wi-Fi channels?
Options
- AThe 2.4-GHz band has 24 non-overlapping channels.
- BDevices that connect to the same Wi-Fi channel reside in the same collision domain.
- CWi-Fi channels are spaced 30 MHz apart.
- DThe 5-GHz band offers 11 different channels for Wi-Fi clients.
How the community answered
(20 responses)- B85% (17)
- C10% (2)
- D5% (1)
Why each option
Within Wi-Fi networks, all devices connected to the same channel operate within a single collision domain, as they share the same half-duplex medium.
The 2.4-GHz band typically has 3 non-overlapping channels (1, 6, 11) in North America, not 24.
In Wi-Fi (802.11) networks, the CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) mechanism implies that all devices communicating on the same channel within range must contend for the shared wireless medium. This shared medium characteristic means they all reside within the same collision domain, where only one device can transmit at a time to avoid data corruption.
Wi-Fi channels are typically spaced 5 MHz apart (e.g., 2.4 GHz) or have specific center frequencies (e.g., 5 GHz), not universally 30 MHz apart.
The 5-GHz band offers many more non-overlapping channels than 11, often 20+ depending on regulatory domain and DFS usage.
Concept tested: Wi-Fi collision domains
Source: https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan/113437-wlan-channels.html
Topics
Community Discussion
No community discussion yet for this question.