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Routing Datagrams to Remote
Hosts
Internet gateways are commonly referred to as IP
routers because they use IP to route packets between networks. In
traditional TCP/IP terms, there are only two types of network devices:
gateways and hosts. Gateways forward packets between networks, and
hosts do not. However, if a host is connected to more than one network
(called a multihomed host), it can forward
packets between the networks. When a multihomed host forwards packets,
it acts like any other gateway and is considered to be a gateway.
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