What is meant by channels used by wireless networks and why there is different channel number for each Wi Fi?

Question

and on which thing channel number depend in wireless networks. Please help me.
Thanks in advance.

Answer 1

Each channel is a different frequency. Some times your wireless will work better on one channel than another (if a neighbor is using the same or adjacent channel, it tends to slow things down for both of you). The PC will automatically detect the channel being used by your wireless router, so it's simple to change the channel and see if things improve. The "Auto" setting on many routers checks to see which frequency has the least noise and uses that one.

Answer 2

Home wireless networks based on the 802.11b or 802.11g standards transmit their signal in a narrow radio frequency range of 2.4 GHz. Various other electronic devices in a home, such as cordless phones, garage door openers, baby monitors, and microwave ovens, may use this same frequency range. Any such device can interfere with a Wi-Fi home network, slowing down its performance and potentially breaking network connections.

Likewise, the wireless networks of neighbors generally all use the same form of radio signaling. Especially in residences that share walls with each other, interference between different home networks is not uncommon.

The 2.4 GHz Wi-Fi signal range is divided into a number of smaller bands or "channels," similar to television channels.

In most countries, Wi-Fi equipment provides a set of available channels to choose from. In the United States, for example, any of the Wi-Fi channels 1 - 11 can be chosen when setting up a wireless LAN (WLAN). Setting this WiFi channel number appropriately provides one way to avoid sources of wireless interference.

Many wireless products in the U.S. ship with a default Wi-Fi channel of 6. If encountering interference from other devices within the home, consider changing the channel up or down to avoid it. Note that all Wi-Fi devices on the network must use the same channel.

Unlike television channels, some Wi-Fi channel numbers overlap with each other. Channel 1 uses the lowest frequency band and each subsequent channel increases the frequency slightly. Therefore, the further apart two channel numbers are, the less the degree of overlap and likelihood of interference. If encountering interference with a neighbor's WLAN, change to a distant channel. Both channels 1 and 11 do not overlap with the default channel 6; use one of these three channels for best results.