December 2009
Intermediate to advanced
1170 pages
28h 4m
English
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Chapter 21. Internet Networking
CHAPTER GOALS
To understand the concept of sockets
To learn how to send and receive data through sockets
To implement network clients and servers
To communicate with web servers and server-side applications through the Hypertext Transfer Protocol (HTTP)
You probably have quite a bit of experience with the Internet: the global network that links together millions of computers. In particular, you use the Internet whenever you browse the World Wide Web. Note that the Internet is not the same as the "Web". The World Wide Web is only one of many services offered over the Internet. E-mail, another popular service, also uses the Internet, but its implementation differs from that of the Web. In this chapter, you will see what goes on "under the hood" when you send an e-mail message or when you retrieve a web page from a remote server. You will also learn how to write your own programs that fetch data from sites across the Internet and how to write server programs that can serve information to other programs.
The Internet Protocol
Computers can be connected with each other through a variety of physical media. In a computer lab, for example, computers are connected by network cabling. Electrical impulses representing information flow across the cables. If you use a DSL modem to connect your computer to the Internet, the signals travel across a regular telephone wire, encoded as tones. On a wireless network, signals are sent by transmitting a modulated radio frequency. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.