Overview of IP Routing

According to the destination address, routes are classified into one of the following types:

Network segment route

The destination is a network segment. In this case, if the destination is an IPv4 address, the subnet mask is less than 32 bits, and if the destination is an IPv6 address, the prefix length is less than 128 bits.
Host route

The destination is a host. In this case, if the destination is an IPv4 address, the subnet mask is 32 bits, and if the destination is an IPv6 address, the prefix length is 128 bits.

According to whether the destination directly connects to a router, routes are classified into one of the following types:

Direct route

The router directly connects to the network where the destination is located.
Indirect route

The router indirectly connects to the network where the destination is located.

According to the destination address type, routes are classified into one of the following types: