What is a ping test and what does it measure?

• A. A method to test firewall rules
• B. A procedure for testing DNS resolution only
• C. A diagnostic network command that measures round-trip time to a host and connectivity
• D. A tool for measuring bandwidth consumption

Answer: (C)

A ping test is a diagnostic network command that measures round-trip time to a host and connectivity. It sends an ICMP Echo Request to the destination and waits for an ICMP Echo Reply. By timing how long the reply takes, you get latency information; by counting replies, you can see if any packets were lost. This helps you quickly verify whether the host is reachable and whether there are delays or reliability issues along the path. It’s not meant to test firewall rules directly, nor is it solely about DNS resolution (you can ping by name, but the test’s purpose isn’t name resolution). It also doesn’t measure bandwidth or throughput—that requires other tools. Some devices block or limit ICMP, so a lack of replies doesn’t always mean the host is down. In short, ping is a quick check of reachability and round-trip time between two endpoints.