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Graphics Interchange Format  |  1998-02-10  |  55.4 KB  |  527x296  |  4-bit (16 colors)
   ocr: DATA-UINKE SWIICHINGS ALTERNATE PATH CAPABILITY Router A realizes that the primary pathy Router B receves frames to hostc has failed and, using the destined for host.C, forwards IPr routing protocol OSPF.identifies: them and.updates its an altemate route through router B. routing table. DLSW CSU/DSU PVC: 1 CSU/DSU DLSW SNA host A SNA host A router B router A Permanent Virtual Circuit Frame (PVC) 3 fails, relay PVC2 Host. C recelves data: lcaving hosts A cloud traific. roroute: Is and C unable to transparent communicate directly: Frane relay. access device (FRAD): SNAnode C. Figure 3. IfPVC3fai ...