"Deep" <mail2sukhdeep@gmail.com> wrote:

> ICMP is known as networking layer protocol. But it requires IP to
> transfer its packet to data link layer which is another network layer
> protocol. Then icmp should be transport layer protocol. But still its
> known as network layer protocol. Could you tell me why, please?

Maybe it's because ICMP (and IGMP) are not meant to transport data
packets, but are only meant to report or control stuff at the Network
Layer. I wouldn't obsess over this, though. Uh, unless it's something
you have to answer correctly on an exam, of course.

Bert