Routing Information Protocol (RIP): A distance vector protocol that uses hop count as its metric to determine the best path for routing packets. Open Shortest Path First (OSPF): A link state protocol that calculates routes based on the shortest path algorithm, considering factors such as bandwidth and latency.
所以，2020年 912 考试，考的是 OSPF + 最短路径算法。
Prerequisites for RIP
You must configure ip routing command before you configure RIP.
Restrictions for RIP
Routing Information Protocol (RIP) uses hop count as the metric to rate the value of different routes. The hop count is the number of devices that can be traversed in a route. A directly connected network has a metric of zero; an unreachable network has a metric of 16. This limited metric range makes RIP unsuitable for large networks.
IP Routing Commands （Cisco）
Addr: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/17-8/command_reference/b_178_9300_cr/unicast_routing_commands.html
In the enterprise, Open Shortest Path First (OSPF) routing has largely replaced RIP as the most widely used Interior Gateway Protocol.
Dijkstra, RIP, OSPF：RIP算法
https://www.cnblogs.com/shoelesscai/p/17809738.html