OSPF protocol troubleshooting

OSPF protocol troubleshooting 01. How does OSPF prevent routing loops? 1. OSPF in the region adopts the SPF algorithm, and the algorithm itself has no loops. 2. each region is adjacent to the Region 0 to ensure that there is no ring between the regions. when connected to different AS, the source route may be lost 02. what are the network types of OSPF? Point-to-point, point-to-point, broadcast, NBMA, and virtual link 03. What are the statuses of OSPF neighbor routers? In which status do I select the master-slave relationship? DOWN, ATTEMPT, INIT, 2-WAY, EXSTART, EXCHANGE, LOADING, and FULL select the master-slave relationship in the EXSTART status 04. What are the group types of OSPF? Which type starts to determine the master-slave relationship? HELLO data packet database description (DBD) Link Status request link status update link status confirmation 05. Which network type is used for the attempt status of the ospf neighbor router? Which router types are used for NBMA 06. OSPF? In the backbone router area, the router ABRASBR 07. What types of OSPF areas are available? Backbone area general area peripheral area full peripheral area non-full peripheral area