This chapter covers the following exam topics:
4.1. Describe and configure basic routing concepts
4.1.a. Packet forwarding
4.2. Describe the operation of Cisco routers
4.2.c. Router components
Routers and Layer 3 switches add IP routes to their routing tables using three methods: connected routes, static routes, and routes learned by using dynamic routing protocols. The routing process forwards IP packets, but if a router does not have any routes in its IP routing table that match a packet’s destination address, the router discards the packet. Routers need routing protocols so that they can learn all the possible routes and add them to the routing table. Thus, the routing process can forward (route) ...