While troubleshooting an IPv4 network connection problem, you start to wonder if the local computer's NIC is working correctly. What command should you enter at the command prompt to test your theory?

Ping

Explanation:

A ping is a utility network ad ministration, we can test the access to the network on an IP (Internet Protocol), we can use this utility in almost every system with a network, a ping measures the round-trip time for messages sent from the originating host to a destination computer, and operates by sending Internet Control Message Protocol (ICMP).