LayersBit-stuffingNetwork LayerRoutingRoutingMIT OpenCourseWarehttp://ocw.mit.edu 6.033 Computer System Engineering Spring 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms.LayersE2ENetLinkencapsulationE2ENetworkLinkÆ D Æ A Æ DSenderBit-stuffingend = 111sndr: 111 Æ 1110rcvr: 1110 Æ 111net: 1111 net: 1110link: 11101 link: 11100Network Layer1) forwarding2) ratingBCADEDest Next LinkABCDEE2EL2L1L1L2L2L2L2L2L2L1L1L1L1L3L3L1IP IPX AppletalkTCP UDPENET wifimodemlinksE2ENetLinkRouting1) Scalable2) Robust3) DistributedRouting “Soft State”2 steps:- Advertisement- IntegrationIssue: ScalabilitySoln: HierarchyAutonomous systems (ASes)ACBDEF2.EAddr Link1.A1.A1.B1.C2.*E2E1221212border
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