Ping, ICMP and TCP Ping

[zaka rias <sciensez () yahoo com>]

hi,

Im learning protocol tcp/ip and icmp, and as far as i
know that Ping (software) is using ICMP protocol to
transmit packets and PING is identic with ICMP.

I have always wrapped my thinking that ICMP (and Ping
Program) echo/reply was a port 0 thing (like someone
said in
http://forum.sans.org/discus/messages/78/10869.html?1110164175
), and that's wrong.

Then i found something called TCP-PING. TCP PING can
be described as a TCP packet with the ACK flag set,
destined for port 80 of the target host (Mark
Wolfgang, Host Discovery With NMAP).

i just wonder if this kind of method called TCP-PING,
when actually TCP-PING isnt using ICMP protocol, and
once more ->  TCP PING 's using port when actually
PING program is not using a port to communicate.

 

i hope you understand my english



zak


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