physical layer

1 definition found

physical layer - Free On-line Dictionary of Computing (26 May 2007) :

  physical layer
  
     <networking> Layer one, the lowest layer in the OSI seven
     layer model.  The physical layer encompasses details such as
     electrical and mechanical connections to the network,
     transmission of binary data as changing voltage levels on
     wires or similar concepts on other connectors, and data rates
     .
  
     The physical layer is used by the data link layer.
  
     Example physical layer protocols are CSMA/CD, token ring
     and bus.
  
     (2004-06-29)