Ping Test
Reachability and latency are separate questions. A ping test measures round-trip time to a host and how many probes come back, which tells you whether a mail server is merely slow or is not answering at all, the distinction that decides whether to investigate routing or the service itself.
Learn About Ping Testing
Understanding network connectivity and latency measurement
This page provides original, human-reviewed information about ping testing, explaining ICMP echo behavior, latency and packet loss interpretation, and why some hosts block ICMP without being offline.
Ping is a network utility that tests the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer.
Ping uses ICMP (Internet Control Message Protocol) Echo Request and Echo Reply messages to test connectivity.
-c countNumber of packets to send-i intervalWait interval between packets-s sizePacket size in bytes-W timeoutTimeout for each replyRelated Tools
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