Final answer:
To see if RIP is enabled on a router, one should use the 'show ip protocols' command in the router's CLI. This will display whether RIP or any other routing protocols are configured and in operation. The correct choice from the MCQs given is option b. Display IP protocols.
Step-by-step explanation:
To determine if RIP (Routing Information Protocol) is enabled on a router, one would typically enter a command into the router's command-line interface (CLI). While the specific command can vary slightly depending on the router's operating system, the most common command to check the status of RIP on a Cisco router, for instance, is 'show ip protocols'. This command provides detailed information about the routing protocols that are currently configured on the router, including RIP if it is enabled.
Looking at the provided multiple-choice options, the correct answer would be b. Display IP protocols. This option aligns with the standard command used to view the status and settings of routing protocols like RIP.
Additionally, by executing a command such as 'show ip route', you can view the router's routing table. While this will show you the active routing table entries and how they were learned (which can include routes learned via RIP), it does not confirm whether RIP is enabled or disabled; it only shows the results of whatever routing protocols are in operation.