What is a common diagnostic command used to check connectivity between two network points?

The command "ping" is commonly used to verify connectivity between two network points. It works by sending Internet Control Message Protocol (ICMP) echo request packets to the target host and waiting for a response. If the host is reachable, it will reply with an echo reply message, indicating that the connection is active and the round-trip time can also be measured. This tool helps diagnose network issues by checking whether another device on the network can be reached and is functioning properly.

While the other commands also serve important purposes in networking, they do not specifically focus on connectivity checks in the same direct way that "ping" does. For instance, "trace" is used to track the route packets take to reach a destination, "ipconfig" is utilized to display network configuration details of the local machine, and "nslookup" is used to query DNS records to resolve hostnames to their corresponding IP addresses.