计算机网络:
在过去的几十年中,计算和通信技术领域有许多发展。随着通信技术的进步,通过计算机网络对信息共享和传播的需求得到了广泛认可。
计算机网络可以描述为自动计算机相互连接的集合。换句话说,网络链接两个或多个设备,并可以在它们之间共享信息。如果计算机能够相互更改信息,则告诉计算机可以互连。它们可以通过光纤电缆,铜线,微波或通信卫星连接。
A major part of networking is scalability. Scalability is the ability to gain system performance gradually as the workload increases. For example, a scalable network system could be one that can start with just a few nodes but may easily expand to thousands of nodes. Any device which is connected to the computer network may be termed as a node in this case. Nodes may be computers, printers, servers, switches, routers, cell phones, hubs, etc. A node has an address on the network and makes use of the computer network as a medium of communication.
计算机网络是一个数据通信系统,链接两台或多台计算机以交换数据(文档,表格等)并共享(CD-ROM,打印机,存储设备)之类的资源。网络上的计算机可以通过电缆,无线电波,电话线,红外光束或卫星链接。
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