> For the complete documentation index, see [llms.txt](https://mudassirs46.gitbook.io/network-fundamentals/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mudassirs46.gitbook.io/network-fundamentals/ping-packet-internet-groper.md).

# PING (Packet Internet Groper)

## Routing

* Some other [Network Layer](https://app.gitbook.com/@mudassirs46/s/network-fundamentals/~/drafts/-MRZ8l67L5MHnaQIEh9W/network-layer) features which are related to IP Routing are DNS , ARP & PING.
* Ping is a tool or application of IP Upper Layer Protocol Stack (Layer 1,2&3) used to get Network Layer/IP Layer/Layer 3 Status. 
* Ping sends ICMP (Internet Control Message Protocol) Echo packets using ICMP Echo Request to get Network Layer Status & the computer replies with the ICMP Echo Reply.
* Ping is also used to check connectivity, calculate latency & verify drops.
* Results of PING may not be relevant for Real Time Packets used over QOS enabled path.

## Reference:

CCNA 200-301 OCG, Volume 1, Pg. 78 - Wendell Odom.