hi
I'M ASHRAF FROM YEMEN I STUDY IN MYTECC WITH MY TEACHER AND WE LEANED ABOUT WHAT IS NETWORK SO I WANT YOU SEE IT TO TELL ME HOW IS IT? GOOD OR NO
I WILL SPEAK ABOUT MYTECC SOON
I WILL LEFT YOU WITH IT
3. Read: What Is A Network?
I'M ASHRAF FROM YEMEN I STUDY IN MYTECC WITH MY TEACHER AND WE LEANED ABOUT WHAT IS NETWORK SO I WANT YOU SEE IT TO TELL ME HOW IS IT? GOOD OR NO
I WILL SPEAK ABOUT MYTECC SOON
I WILL LEFT YOU WITH IT
3. Read: What Is A Network?
| In the computer world, a network is a group of computers set up to communicate with each other. Computers usually communicate with each other by making requests and giving responses; see figure 1. One computer issues a request for a service, and a second computer responds to that request. The requestor takes on the role of a client, and the responder takes on the role of a server. Figure 1: How computers communicate  A simple network is called peer-to-peer network. In a peer-to-peer network, the networked computers act as equal partners (peers); see figure 2. As peers, each computer can take on the client function or the server function. At one time, computer A, for example, may make a request for a file from computer B, which responds by serving the file to computer A. Computer A functions as the client, while B functions as the server. At a later time, computers A and B can reverse roles. Peer-to-peer networks are small and easy to operate. They can be found in homes and small businesses. Figure 2: A peer-to-peer network  Client-server networks are larger networks. This kind of network can be found in schools or bigger businesses. In a client-server network, the network services are located on a special computer called a server which responds to the requests of the clients' computers; see figure 3. The server is a central computer that responds to the clients' request for file, print, application, and other services. Figure 3: A client-server net  The Internet is also a network. It is a network of networks. The Internet is a worldwide public network that connects thousands of other networks to form one large "web" for communication. This is why it is called the World Wide Web (or WWW); see figure 4. When we want to surf the World Wide Web, we connect our home or school computer to a local Internet server. The local Internet server connects to other servers around the world. This enables us to surf and communicate. Figure 4: The Internet   |
