
349routing and remote aCCess serviCe
e hierarchical routing method here is a two-level hierarchical system. In general,
hierarchical routing can be more than two levels of regions for a large complicated
enterprise-level network.
So far, we have discussed how a router works. e routing protocol is the key to
carry out the routing functionality. In the next section, we are going to examine
another RRAS service, NAT, which allows network hosts on a private network to
share a single Internet connection.
9.3 Network Address Translation
As we know, private IP addresses cannot be recognized on the Internet. For a
computer with a private IP address to ...