Try the Assigned Numbers RFC, which is RFC 1700. It tells you port numbers 
for various applications and whether they use TCP or UDP or both. It's a 
good RFC to bookmark. I found it here:

http://www.faqs.org/rfcs/rfc1700.html

Priscilla


>----- Original Message -----
>From: "shella kevin"
>To:
>Sent: Monday, August 27, 2001 8:04 AM
>Subject: access-list & ports ( TCP /UDP) [7:17374]
>
>
>when dealing with access-list we use both TCP & UDP. For example we use
>tcp 53 or udp 53 for domain.
>
>My Q is when & how we know when we should use UDP and when TCP .........
>what is the difference .
>
>
>
>Thanks
>
>Shella K.


________________________

Priscilla Oppenheimer
http://www.priscilla.com




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