We have already seen that the Internet consists of many
networks/subnets) interconnected by routers.
Where a router is used to connect two geographically adjacent LANs
(see last lecture), it is simply equipped with two appropriate LAN
interfaces. Where the LANs to be connected are not physically near
one another, it is normal for a point-to-point link to be used,
thus:
See later for discussion of "leased line" links, commonly used in
this context.
