Which command line entry is commonly used to test latency and packet loss?

The command most commonly used to test latency and packet loss is Ping. The Ping utility sends Internet Control Message Protocol (ICMP) echo request packets to a destination address and listens for echo reply packets. By measuring the time it takes for the packets to travel to the destination and back, it provides a round-trip time (latency) measurement. Additionally, Ping counts how many packets were sent and how many were received, allowing users to determine if any packets were lost during transmission, which helps evaluate the overall health and reliability of the network connection.

Using Ping is essential for diagnosing network issues, as it provides instant feedback on whether a particular device on the network is reachable and how well the connection is performing in terms of speed and stability.