ocr: ROUTING UPDATE MESSAGES USING UNICAST OVER FRAME RELAY NETWORKS Every 30 seconds: Router. A Router B. Router: C Routing information Protocol (RIP) LLERA B - L IP packet to Router B RIP IP packet to Router C RIP IP packet to Router D Every 30 seconds: RIP IP packet to Router E RIP IP: packet from Router. A RIP IP packet to Router F Every 60 seconds: Every 60 seconds: RIP IPX packet to Router B Frame relay RIP IPX and SAP packets Service Advertising Protocoi (SAP) network from Router A packet/s) to Router B RIP IPX packet to Router C SAP packet(s) to Router C RIP IPX packet to Router D - SAP pac ...