Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...
Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...
Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
CHAPTER 7<br />
Wide Area Networking<br />
107<br />
<strong>Exam</strong> objectives in this chapter<br />
■ What is a WAN<br />
■ Switching Methods<br />
■ WAN Protocols and Properties<br />
■ Internet Access Methods<br />
WHAT IS A WAN<br />
A wide area network (WAN) is a computer network covering a wide geographical<br />
area, including more than one remote location. The geographically dispersed<br />
locations are interconnected, thus forming a WAN.<br />
Fast Facts<br />
WANs may be created in different configurations, with the most common being<br />
some combination of public networks and private networks.<br />
■<br />
■<br />
■<br />
Public networks are publicly accessed and connected to the Internet. They<br />
may use Internet Protocol Security (IPSec) or a virtual private network<br />
(VPN) to build a WAN over the Internet.<br />
Private networks are point-to-point network links, which are separated<br />
from the public Internet either physically or virtually. They may use<br />
Frame Relay or Multiprotocol Label Switching (MPLS) or a similar<br />
technology.<br />
A WAN covers a relatively broad geographic area and often uses transmission<br />
facilities provided by common carriers, such as telephone<br />
companies.
Change language