ping
[gping](https://texonom.com/gping-1f3a029a8a2642b2a94095fa5a4dd8c8) [Transport Layer](https://texonom.com/transport-layer-c594fa30c92143cd9d2098c128de330f) 







### PING port
ping 은 포트가 없다
> [What OSI layer is ping?](https://www.quora.com/What-OSI-layer-is-ping)






