802.3 v/s 803.11

This gives a nice overview of the differences between  Ethernet and Wifi at a protocol level.


  • The crux of the problem is this : ¬†“The CSMA/CD protocol is not used in a wireless environment due to the user has no capability to sense/listen to the channel for collision while sending the packet [12].
  • This necessitates things like Collision Avoidance techniques to be used for Wifi.¬† And that imposes limits on how fast you can transmit packets at a certain frequency band leading to slower speeds.