Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 177

An engineer has added the following configuration snippet to an implementation planning document. The configuration will be added to Router R1, whose Fa0/0 interface connects to a LAN to which Routers R2 and R3 also connect. R2 and R3 are already EIGRP neighbors with each other. Assuming the snippet shows all commands on R1 related to EIGRP authentication, which answer lists an appropriate comment to be made during the implementation plan peer review? key chain fred key 3 key-string whehew interface fa0/0 ip authentication key-chain eigrp 9 fred

Answer options

• A. The configuration is missing one authentication-related configuration command.
• B. The configuration is missing two authentication-related configuration commands.
• C. Authentication type 9 is not supported; type 5 should be used insteaD.

Correct answer:

Explanation

The correct answer is A because the configuration snippet provided includes the key chain but does not specify the key chain on the EIGRP process, which is necessary for successful authentication. Answer B is incorrect as only one command is missing, while answer C is also wrong since EIGRP authentication type 9 is valid and supported.