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

Supplemental Lab or Challenge Activities:
1. Go out to CISCO and find out how Designated Routers and Backup
Designated Routers are elected.
2. Find out why we use loopback address with OSPF.
3. Capture and analyze the OSPF packet structure.
4. What is a “hello” packet in OSPF?
So What Did I Just Learn Here?
In this lab you learned the basics of the OSPF routing protocol. Trust me…there is a lot
more to this routing protocol. You also learned about the basics of wildcard masks. We
will be using these in a couple more labs on Access Control Lists so now was a good time
to bring this up.
Guest Router Name
Washington Leung was sentenced in early 2002 to 18 months in Federal prison and
$92,000 in restitution for illegally accessing and deleting records at his former place of
employment using the computers of his new place of employment (I will bet the new
place of employment is now another former place of employment). Apparently he made
unwanted advances to a female at his first company and was fired for it. He worked in
the Human Resources Department on employment records, compensation, payroll, and
passwords of accounts. After he was terminated from his first company he landed a job
at a new company. Guess what? The first company never changed those passwords. So
Leung copied and then deleted about 1000 records from the first company over the
Internet using computers at his second job. He also gave that woman’s file a makeover: a
$40,000 a year RAISE and a $100,000 bonus. Then he created a Hotmail account in the
woman’s name and sent an email to the executives of the first company from “her” with
an attachment of her original file. Don’t try this at home boys and girls: Forensic images
of the computer he used at the second company revealed the hotmail account was created
with that computer. Boo-ya! Busted prison style!
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