Access Layer

Access Layer
The access layer controls user and workgroup access to internetwork resources. The access layer
is sometimes referred to as the desktop layer. The network resources that most users need are
available locally. Any traffic for remote services is handled by the distribution layer. The following
functions should be included at this layer:
 Continued (from distribution layer) access control and policies.
 Creation of separate collision domains (segmentation).
 Workgroup connectivity to the distribution layer.
 Technologies such as dial-on-demand routing (DDR) and Ethernet switching are frequently
seen in the access layer. Static routing (instead of dynamic routing protocols) is seen here
as well.
As already noted, having three separate levels does not have to imply having three
separate routers. It could be fewer, or it could be more. Remember that this is a layered
approach.