What is ping?
Ping is a simple reachability and timing test. It usually sends ICMP echo requests and measures how long it takes to receive replies.
- What ping can tell you quickly.
- Why latency and packet loss matter.
- Why ping can fail even when a service is still reachable.
What it measures
A successful ping confirms that the path for that ICMP request worked and that the target or a device in front of it answered.
The round-trip time gives a simple latency estimate.
What it does not measure
Ping does not tell you whether a web service, game server, or mail port is healthy.
It also does not show the path or the exact point of failure.
Common failure causes
Host firewalls, routers, security groups, cloud policies, and ISPs often block ICMP.
A failed ping is useful, but it does not automatically mean the destination is offline.
How to use it with WhenIP
Use Ping me to test reachability from the server side to the public IP your browser is presenting.
Compare the result with traceroute and port checks for better diagnosis.
Is low ping always good?
Lower latency is usually better, but consistency and packet loss matter too.
Why do games work when ping fails?
Because the game may use TCP or UDP while ICMP is blocked.
Last updated: March 29, 2026