3.6 Types of Routers (5/5)
nIf two routers are attached over a point to point link, this is still considered as a network to the routers, it just does not have any
other network devices on it except for the router at the
other end.
nBecause of the way the internet has grown, most ASs
don’t have a single network ID. They generally have several. This means
that the gateways have to have many subnet masks, each
one associated with every net ID in its AS. E.g., 158.32
& 131.90 are 2 class B addresses that maybe used by an AS.