Figure 3-1 illustrates that a
router in the network can have knowledge of networks that are not directly connected to an interface
on that device. These routes must be con?¬?gured statically or learned via routing protocols.
Figure 3-1 Routing Protocols
Network
10.1.1.0
Network
172.16.0.0
Network
Protocol
EIGRP
OSPF
Destination
Network
10.1.1.0
172.16.0.0
Exit
Interface
FA0/1
FA0/2
Reviewing Dynamic Routing 99
The following are the differences between a routed protocol and a routing protocol:
?– Routed protocol: Any network protocol that provides enough information in its network
layer address to enable a packet to be forwarded from one host to another host based on the
addressing scheme, without knowing the entire path from source to destination. Packets
generally are conveyed from end system to end system. IP is an example of a routed protocol.
?– Routing protocol: Facilitates the exchange of routing information between networks,
enabling routers to build routing tables dynamically. Traditional IP routing stays simple
because it uses next-hop (next-router) routing, in which the router needs to consider only
where it sends the packet and does not need to consider the subsequent path of the packet on
the remaining hops (routers).
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