87
Chapter 7:
Making WAN Connections
The U.S. military originally developed and designed X.25 to make military voice
traffic available even after a nuclear strike. As you might guess from this design
objective, X.25 is an extremely reliable, secure protocol for transmitting data. All frames
(similar to packets) sent over X.25 networks are completely verified from one end of the
connection to the other.
Chapter Summary
In this chapter, you learned about concepts and technologies relating to WANs,
including different types of links and different types of connections, as well as how
to specify a particular type of WAN technology for a given application. While the
number of choices may make this area confusing, it becomes easier when you break the
problem down into smaller chunks. Basically, make sure you do a careful and thorough
job of identifying your WAN needs, and then work with various WAN providers in
your area to analyze how their solutions may meet your needs.
The next chapter moves into network protocols, like TCP/IP and IPX/SPX. You
learn how these network protocols work, how their packets are constructed, and
various characteristics of each type of network protocol. You also learn about some of
the other common protocols, particularly those associated with TCP/IP, such as SMTP,
HTTP, and WINS.
Summary :
87 Chapter 7: Making WAN Connections The U.S. military originally developed and designed X.25 to make military voice traffic available even after a nuclear strike. You learn how these network protocols work, how their packets are constructed, and various characteristics of each type of network protocol.
Tags :
wan,chapter,network,make,protocols,x25,other,different,into,work,packets,learn,connections