1. The RIP process operates from UDP port 520.

2. The metric used by RIP is hop count, with 1 signifying a directly connected network of the advertising router and 16 signifying an unreachable network.

3. RIP sends periodic updates every 30 seconds minus a small random variable that prevents the updates of neighboring routers from becoming synchronized.

4. Default route can be advertised in the RIP domain several ways: e.g. (1) static route to 0.0.0.0, with the “redistribute static” command, (2) “default-information originate” command, and (3) “ip default-network” command.
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