Chapter 5
Hello There!
“The net is down again, I am calling my ISP right now.” “Oh, you don’t have Wi-Fi here?” We all had such dreaded moments. The computer is a powerful machine. But without being connected and able to communicate with others, it is such an isolated and lonely existence.
Computers are heavily dependent on networking to do many basic things, such as software update, email, instant messaging, video call, surfing the Web, and even setting the system clock. Actually, it is hard to tell where the computer ends and the network begins. No wonder why people say, “The network is the computer.”
Basically, processes on one computing device can communicate and interact with processes on other computing devices connected by networks. ...
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