Just an open question ? We read, learn and teach Routing protocols are at the NETWORK layer of the famous OSI model...
But they have PROTOCOLS NUMBERS - TRANSPORT LAYER(such as IGRP protocol 9, EIGRP protocol 88 and OSPF protocol 89)and APPLICATION PORTS values - APPLICATION LAYER (RIP uses port 520 and BGP4 uses port 179) indicating they work in the upper layers and not in the network layer, although the result is shown int the NETWORK layer... So may question is... Do they really operate at LAYER 3 ? Warm regards, Jose Luis De Abreu ______________________________________________________ Send your holiday cheer with http://greetings.yahoo.ca Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29139&t=29139 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
