(OSPF details. ·Based on IPProtocol89. ·Link Status Routing Protocol (intra-area) ·Transfer LSA//Link Status Advertisement ·Support Classless IP, VLSM, CIDR, Manual Summarization ·Support Verification. ·The update method mainly relies on triggering the update (LSA synchronization period is 30min) ·The address of the update scheme is 224.0.0.5 or 224.0.0.6 ·Quick response to network changes ·Select the SPF algorithm (Dijkstra algorithm) to calculate the best way.)