200-101 Question #123: Real Exam Question with Answer & Explanation

The correct answer is A: show ip protocols. Diagnosing a RIP version mismatch requires both a configuration-level view and a real-time packet-level view. 'show ip protocols' shows configured send/receive versions per interface, while 'debug ip rip' captures the actual version field in exchanged packets.

Question

An administrator is troubleshooting a problem between routers that are using different versions of RIP. Which two commands would provide information about which version of RIP was being sent and received on an interface? (Choose two.)

Options

Ashow ip protocols
Bshow ip route rip
Cshow interfaces
Ddebug ip rip routing
Edebug ip rip

Explanation

Diagnosing a RIP version mismatch requires both a configuration-level view and a real-time packet-level view. 'show ip protocols' shows configured send/receive versions per interface, while 'debug ip rip' captures the actual version field in exchanged packets.

Common mistakes.

B. 'show ip route rip' lists only the routes installed in the routing table via RIP and contains no information about the RIP version in use on any interface.
C. 'show interfaces' reports Layer 1 and Layer 2 counters such as input errors and bandwidth but does not expose any routing protocol version information.
D. 'debug ip rip routing' is not a valid Cisco IOS command - the correct commands are 'debug ip rip' and 'debug ip rip events'.

Concept tested. RIP version troubleshooting using show and debug commands

Reference. https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html

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