Chapter 6. IPv4 Routing

Terms you'll need to understand:

• Classless Interdomain Routing (CIDR)

• Default route

• Dynamic route

• Distance vector routing protocol

• IP forwarding

• Link-state routing protocol

• Router Discovery Protocol (RDISC)

• Router Information Protocol (RIP)

• Route table

• Static route

Concepts you'll need to master:

• Explain the purpose and usage of routing types (direct and indirect), routing schemes (static and dynamic), and routing protocol types (autonomous systems, interior routing protocols, and exterior routing protocols).

• Given a routing table example, describe table entries, identify the routing table search order, and associate a network name to a network number.

• Explain how to configure static and dynamic routing, and the configuration of routing at boot time.

• Describe the operation of CIDR.

• Given a routing scenario problem, troubleshoot the router configuration and/or network names and select a resolution.

Routing is fundamental to any TCP/IP network because it provides the facility to forward IP datagrams to hosts on a different network. When networks are connected together, there must be a mechanism to route data packets to the other networks. Routing accomplishes this. Routing occurs at the Internet layer of the TCP/IP model.