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

So what have I learned here?
In this lab you have learned there are many different encapsulation types on a serial
interface and that CISCO routers use HDLC by default. Other manufactures use different
encapsulations, for example IBM routers use SDLC for their encapsulations by default.
Why is this lab here and not in part 2? PPP allows us to set authentication parameters
(ew! Geek-speak). In “real-people” talk this means we can set user names and passwords
for people to “dial-in” (aha! Remote access=WAN technology) to our serial lines.
Remember our serial lines typically run over the web or telephone lines over great
distances. This usually means security is very important (refer to guest names below). In
the next lab you will learn how to set up those user names and passwords with PPP.
Guest Router Name Derivation
Terminus, Leftist, and Urvile were three hackers from the Legion of Doom, who lived in
Georgia, that were busted in 1990 by the U.S. Secret Service in connection with the
Martin Luther King Day AT&T long distance network crash. They were known as
“switching gurus” and as “heavy hitters” within the LoD because they frequently
accessed BellSouth’s network. Apparently BellSouth, at that time, did not have very
strict security in place.
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