IP routing

Windows NT Server has the ability to be configured as a router. This is known as a multihomed computer.
A multihomed computer must have at least two network interfaces connected to separate subnets.

Each network interface is capable of having up to five IP addresses.

Multihomed computers can be configured as either static or dynamic routers.

ROUTE.EXE is used for configuring static gateways. The router must have the next routers destination
IP address and hardware address loaded in their ARP cache for a successful hop.

Dynamic routers use the RIP protocol.