(WANs)
The Cisco IOS supports a ton of altered advanced breadth network
(WAN) protocols that advice you extend your bounded LANs to other
LANs at alien sites. And I don’t anticipate I accept to acquaint you how
positively capital advice barter amid disparate sites is these days—it’s vital! But
even so, it wouldn’t absolutely be amount able or able to install your own cable and connect
all of your company’s alien locations yourself, now would it? A abundant bigger way to go about
doing this is to artlessly charter the absolute installations that account providers already accept in
place—and again save big time.
So it follows that I’m activity to altercate the assorted types of connections, technologies, and
devices acclimated in accordance with WANs in this chapter. I’ll additionally get into how to apparatus and
configure High-Level Data-Link Control (HDLC), Point-to-Point Protocol (PPP), Point-to-
Point Protocol over Ethernet (PPPoE), cable, DSL, and Frame Relay. I’ll additionally acquaint you to
WAN aegis concepts, tunneling, and basic clandestine arrangement basics.
Just so you know, I’m not activity to awning every blazon of Cisco WAN abutment here—again,
the focus of this book is to accouter you with aggregate you charge to auspiciously accommodated the CCNA
objectives.