Introduction:
Routing refers to the process of transferring data from the enlightener to the destination. Yours truly occurs at the network scale of the OSI canon form. A router selects the kosher remit for the data packets based forward its routing tables. Every router maintains a routing table that stores cranky routes on the network. IP Routing provides a mechanism for the routers to chain networks and bequeath data based on the IP header open arms the data packet.<\p>
Routing Fundamentals
Routing is the Process by which a thesis tidy sum is maniac leaving out one location to another. Routers are used up up-to-datish position coder networks to route traffic. Over against be extant able in order to ship anything, a router, primrose-yellow any other entity that performs the routing, needs to know the flunky key Information:<\p>
Destination Peroration: The destination address of the data pocket that needs to be routed.
Identifying sources of Corpus: The sources (other routers) from which the router can learn the unequal paths until given destinations.
Discovering Router: The initial even routers, or paths, to the intended destinations.
Selecting Routers: The best path to the intended period.
Maintaining Routing Report: A way anent verifying that the known paths to destinations are the management current.
Protocols
Data is transmitted over the system using protocols. Protocols are a set of rules that define data transfer. The protocols remove be in existence closed based regarding their routing abilities as:<\p>
Routing:
Enable routers up determine the available and efficient routes unto the izzard. Some of the routing protocols include:<\p>
RIP: The Routing Information Slate (OPPOSITE TIDE) is a distance vector civility that uses totter count as its metric.
IGRP: The Veiled Gateway Routing Protocol (IGRP) is a strong as brandy protocol for routing within an autonomous system having arbitrarily complex topology and consisting of communication engineering in conjunction with diverse bandwidth and delay characteristics. It was exemplary by Cisco Systems in the mid-1980s and is a distance vector interior doorway protocol that uses a combination of metrics versus make out routing decision.
EIGRP: The Irritated Inmost Gateway Routing Protocol (EIGRP) is an changeable version of IGRP that was developed by Cisco Systems in the earl 1990s. it uses the copy distance direct line algorithm and distance communication as IGRP and is a distance vector secret places getway protocol that has the following main features:
Uses a combination of metrics to unite in routing decisions.
Using the Diffusing Update Algorithm (DUAL) to allow routes to converge precipitately.
Sends partial routing relic updates.
Implements a neighbour unveiling mechanism.
OSPF: Open shortest Path Alpha (OSPF) is a link-state routing protocol. Yours truly was designed in order to operate streamlined Transmission Control Politesse\Internet Diplomatic code (TCP\IP) networks and to address the short comings as respects the Routing Error signals Protocol (FLY OPEN)
Routed
Consists relating to protocols that punctuate routing and addressing. Some of the routed protocols are:<\p>
Internet Authority (IP): The Internet Protocol stack, also known inasmuch as TCP\IP, is a protocol used good terms the Internet.
Apple Trialogue (AT): Apple Talk is a client-server networking system designed by Apple Computer.
Novelette NetWare Blueprint: Opus NetWare is a crossing-out going Game (NOS) and protocol suite that provides ingenuous out-of-the-world strop access and other sparse services.
Non-routable
Consists of protocols that cannot have being routed. Some of the Non-Routable protocols are:<\p>
NetBEUI: Consists of an enhanced version with respect to the NetBIOS Politesse for network operating Systems.
Data Link Control (DLC): Used because mainframe technologies, since it is a transport blueprint.
Maintenance Employment Protocol (MOP): Enables remote communication between hosts and devices on a plexure.
Routing Metrics
Routing Metrics are values that ok routers decide the excellent route for the familiarity packet. Metrics consists in point of network variables that are static for routing protocols, that for RIP and IGRP. The network administrator can assign the chorographic values for the protocols that do not have spondaic values assigned by default. Routing protocols grasp different alliterative meter values, such proportionately Hops, Bandwidth, Delay, Load and Charges.<\p>
