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VIII Routing Protocols
As we learned in the chapter on Physical
Devices, on all but the very smallest LAN’s that use IP (and
other routable protocols like IPX), a router is used to carry
non-local network traffic between networks.
Routers use specialized protocols
to determine where to send data that is addressed to a host on a
non-local network. Protocols such as RIP (Routing Information
Protocol) or OSPF (Open Shortest Path First) are used
to figure out how to best get the data to its destination, or at least
closer to its destination.
When a network workstation sends
data to a computer on another network, the workstation compares the
destination computer’s address with its own address. If both addresses
are located on the same LAN, the data is sent directly to the destination
computer. If the destination address is on a different LAN, the data
must be routed to the proper network on which the destination
computer is located.
 TCP
TCP is in the OSI Model’s Transport layer (layer 4). It and all other protocols in the TCP/IP stack are routable protocols.
RIP and OSPF
RIP and OSPF are routing protocols
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