Page 109 - M. Abrahim Thesis

— Internetwork Packet Exchange (IPX)

— AppleTalk

Figure 5-1 shown a Routed and Routable Protocols

• Routing protocol—Supports a routed protocol by providing mechanisms for sharing routing
information. Routing protocol messages move between the routers. A routing protocol allows
the routers to communicate with other routers to update and maintain tables.

Here are some TCP/IP examples of routing protocols:

— Routing Information Protocol (RIP)

— Interior Gateway Routing Protocol (IGRP)

— Enhanced Interior Gateway Routing Protocol (EIGRP)

— Open Shortest Path First (OSPF)

For a protocol to be routable, it must provide the capability to assign a network number, as well as a
host number, to each individual device.

Some protocols, such as Internetwork Packet Exchange (IPX), only require that an administrator assign
a network number, because they use a host’s Media Access Control (MAC) address for the physical
number.
Other protocols, such as IP, require that a complete address be provided, as well as a network mask.
Both the IP address and network mask are required to have a routed network. A network mask
separates the network and host portions of a 32-bit IP address. IPX uses the MAC address