Which statement about Wi‑Fi channels is correct?

In Wi-Fi, all devices communicating on the same channel share the same medium. This shared medium means that only one device can transmit at a time without causing a collision. Therefore, devices on the same Wi-Fi channel operate within a single collision domain, requiring mechanisms like CSMA/CA to manage access and prevent simultaneous transmissions. The 2.4-GHz band typically has 3 non-overlapping channels (1, 6, and 11) in most regions, not 24. Wi-Fi channels are generally spaced 5 MHz apart, not 30 MHz. The 5-GHz band offers significantly more non-overlapping channels than 11, often 20 or more depending on regulatory domains and channel bonding.