Network layer

from The Free On-line Dictionary of Computing (8 July 2008)

network layer
layer 3

   <networking> (communications subnet layer) The third lowest
   layer in the {OSI} seven layer model.  The network layer
   determines routing of {packets} of data from sender to
   receiver via the {data link layer} and is used by the
   {transport layer}.  The most common network layer {protocol}
   is {IP}.

   (1994-12-13)