title: What is a wireless channel?
body: <p>As the question , I don't really understand what is a wireless channel.</p>
  
  <p>Supposed we have an access point with the standard 802.11b, it will use the frequency 2.4 GHz -->Is this the bandwith? And the transfer rate of this standard is 11 Mbps. What is the relationship between them? and why do we have to divide the bandwith into different channels?</p>
  
  <p>Thanks in advanced.</p>