Unable to sleep because you have forgotten [or never known] what the IS-IS protocol is and does? The Protocols.com site to the rescue, with a comprehensive listing of relevant data, indexed in a variety of ways [including a full alphabetical list which must contain 400 entries, at the very least].
In addition the site has an on-line library with white papers and other resources available for those who register for the site.
Now you have no excuse for not knowing that the "Hardware type" header in the AARP packet is the identifier for the data-link type....
Posted by jho at October 7, 2003 11:29 AM