You cannot ping a directly connected host. Which IOS command can be used to validate Layer 1 and Layer 2 connectivity?

You cannot ping a directly connected host. Which IOS command can be used to validate Layer 1 and Layer 2 connectivity?

• ping
• show cdp neighbors detail
• show ip interface brief
• show ip route
• traceroute

Explanation: The show cdp neighbors command provides a list of directly connected Cisco devices. This command validates Layer 2 (and therefore Layer 1) connectivity. For example, if a neighbor device is listed in the command output, but it cannot be pinged, Layer 3 addressing should be investigated.

Exam with this question: 16.3.4 Module Quiz - Troubleshoot Static and Default Routes