OK. This is the tricky part since ICMP is built basd on IP protocol and it
works on thesame layer as TCP/UDP. Then why my local services file contains:
echo 7/tcp
echo 7/udp
So the echo here is different than the Echo, Echo-reply protocol we are
talking here?
Regard,
Pengy
On 6/30/08, Keith A. Glass <salgak@???> wrote:
>
> Echo is a specific member of the ICMP family of protocols. But not the
> ONLY member. . .
>
> Ping is typically Echo and Echo-reply.
>
> Hope that clears it up
>
>
> Keith
>
> Security Geek * Curmudgeon at Large * Short on Sleep
>
> On Thu Jun 26 6:00 , "peng liu" sent:
>
> >All,
> >
> >I am checking the ICMP protocol these days and some documents say that
> Ping command in Windows uses ICMP protocol, while others say that Ping uses
> ECHO protocol, which is through TCP port 7.
> >
> >So my question is which protocol is actually used by PING command in
> Windows?
> >
> >Pengy
>
>
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