Todd Lammle's CCNA/CCENT IOS Commands Survival Guide: Exams 100-101, 200-101, and 200-120

Chapter 10

Wide Area Networks (WANs)

The Cisco IOS supports a ton of different wide area network (WAN) protocols that help you extend your local LANs to other LANs at remote sites. And I don’t think I have to tell you how positively essential information exchange between disparate sites is these days—it’s vital! But even so, it wouldn’t exactly be cost effective or efficient to install your own cable and connect all of your company’s remote locations yourself, now would it? A much better way to go about doing this is to simply lease the existing installations that service providers already have in place—and then save big time.

So it follows that I’m going to discuss the various types of connections, technologies, and devices used in accordance ...