ICND1: Interconnecting Cisco Networking Devices Part 1 (CCENT, legacy) — Question 51

Which Ethernet interface command is present when you boot a new Cisco router for the first time?

Answer options

• A. speed 100
• B. shutdown
• C. ip address 192.168.1.1 255.255.255.0
• D. duplex half

Correct answer: B

Explanation

The correct command is 'shutdown', which is enabled by default on Cisco routers to prevent interfaces from being active until configured. The other options, like 'speed 100', 'ip address 192.168.1.1 255.255.255.0', and 'duplex half', are not present by default and require manual configuration.