Learning by Doing: CISCO Certified Network ... - SCN Research

Figure 5—We can even see CDP packets with our protocol. Notice how we see those
CDP characteristics built into the frame: identification (device ID), address, and platform.
Supplemental Lab or Challenge Activity:
1. Try this lab again using nothing but specific debug commands. The first time
through use specific debug commands. The second time through use the “debug
all” command and see how it differs.
2. Try to find out what “promiscuous mode” means as it applies to NIC’s. Why do
you think this would be important as it relates to sniffers?
3. If we didn’t want to run CDP on our network, then how do we disable it?
So What Did We Learn Here?
Tools of the trade. Get used to using protocol inspectors to examine your network health.
They are really cool. If you want to do more with security they are essential.
Guest Router Name Derivation
Emmanuel Goldstein founded 2600 magazine (a.k.a. The Hacker Quarterly) back in
1984. Every four months a magazine devoted entirely to the sharing of information
related to the Internet is published. In many stores you have to ask for it by name
because they keep it under the counter or back in the porn section. It has been suggested
that purchasing 2600 with a check or credit card or subscribing to the magazine
immediately signals the FBI to start a file on you as a “potential hacker.” Want to find
out if you have a FBI file started on you? Netmatix0.virtualave.net/FBIFILES_TXT.txt
Also, in the movie “Hackers” one of the names of a main character was “Emmanuel
Goldstein.” Coincidence? I don’t think so.
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