IGRP (Interior Gateway Routing Protocol) http://www.freetechexams.com/certifications/c... The Interior Gateway Routing Protocol (IGRP) is a Cisco proprietary protocol. Like RIP, IGRP is a distance-vector interior routing protocol. However, unlike RIP, IGRP can be used in larger autonomous systems due to its large maximum hop-count limit of 255, compared to RIP's maximum hop count of 16.
RIP (Routing Information Protocol) http://www.freetechexams.com/certifications/c... RIP is a true distance vector routing protocol. It sends the complete routing table out to all other active interfaces every 30 seconds. RIP uses Hop Count as it's only metric. The maximum number of hops in a RIP network is 15, one hop is a directly connected network, and 16 hops is an unreachable network.
Routing http://www.freetechexams.com/certifications/c... Routing is the process of forwarding packets from one network to another. All the information needed for a router to forward packets to a hop (router/relay device) can be found in the router's routing table.
Cisco Discovery Protocol (CDP) http://www.freetechexams.com/certifications/c... Cisco Discovery Protocol (CDP) is a Cisco proprietary (layer 2) protocol that provides information about directly connected Cisco routers and switches (if enabled on the switch). CDP messages are not forwarded and, of course, not routed (layer 2).
TCP/IP http://www.freetechexams.com/certifications/c... IP was created as a way to hide the complexity of physical addressing by creating a virtual addressing scheme that is independent of the underlying network.
OSI Layer Model http://www.freetechexams.com/certifications/c... The International Standards Organization (ISO) developed the Open Systems Interconnection (OSI) Reference Model to define functional communications standards. This reference model is widely used by equipment manufacturers to assure their products will interoperate with products from other vendors.
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