C. 1,6,11 is right. Question is worded badly, collisions happen in a wired network, congestion happens in a wireless network.

C is right. 1,6,11 don't overlap.

Selected Answer: C In the 2.4 GHz frequency band, the three channels that are often used to reduce collisions when using direct sequence spread spectrum (DSSS) are channels 1, 6, and 11. These channels are spaced far enough apart in the spectrum to cut down the chance of interference between devices operating on different channels. DSSS is a spread spectrum technique that is used to lessen the effect of interference on wireless communication. It works by spreading the data signal over a broad frequency band by modulating the data with a high-frequency code, or "chipping" code. This chipping code is used to spread the signal over a wide frequency range, making it less susceptible to interference and more resistant to noise. By using DSSS and choosing channels 1, 6, and 11, it is possible to limit collisions and improve wireless network performance. It's important to note, however, that other factors, such as the number of devices on the network, the type of devices, and the distance between devices, can also affect network performance and may require additional strategies to optimize network performance.

1, 6, 1

2.4 Ghz uses 5-hop metrics for limiting collisions

1,6,11

congestion and interference happen in a wireless network

1+6+11 :) ♥ C IS CORRECT

It depends on the region/country where you live, but most commonly it is 1, 6 and 11.

1,6,11 is right

Selected Answer: C CCCCCCCC

C is the one.