Dear Leland: Thank you for the clarification and the link.
At 04:08 PM 12/8/2007, you wrote: >Port 7 is designated for the echo service, which I was thinking ping >used, but perhaps not. > >I decided to look into you question a little more, since this is >something I should know. Based on my understanding of what I'm reading >on the Internet, the ping command lives in it own ICMP protocol world, >carried via the network layer (IP) protocol. It seem from what I'm >getting from the Internet that ping does not use a port number, but >rather works within the ICMP protocol layer, which is apart from TCP. >So, like a web server can talk to a client browser using the HTTP >protocol, (e.g. language), or a mail server can communicate with a email >client using SMTP protocol, computers can communicate (e.g. talk across >the Internet using ICMP protocol over the IP protocol without the need >for a port number. If there is any designated port for ping, I can't >find it. Below is an excerpt with the source link: > >#------------------------------------------- >It is the responsibility of the network layer (IP) protocol to ensure >that the ICMP message is sent to the correct destination. This is >achieved by setting the destination address of the IP packet carrying >the ICMP message. The source address is set to the address of the >computer that generated the IP packet (carried in the IP source address >field) and the IP protocol type is set to "ICMP" to indicate that the >packet is to be handled by the remote end system's ICMP client interface. > >http://www.erg.abdn.ac.uk/users/gorry/course/inet-pages/icmp.html > >or > >http://tinyurl.com/9wwcr > >#--------------------------------------- > >Regards, > >LelandJ -- Charles -- Mailto:[EMAIL PROTECTED] Website: <http://homepages.uc.edu/~enzerch>http://homepages.uc.edu/<http://homepages.uc.edu/~enzerch>~enzerch _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
