英语翻译A wide area network (WAN) is a computer network that cov

来源：学生作业帮编辑：搜搜考试网作业帮分类：英语作业时间：2024/07/05 04:02:20

英语翻译
A wide area network (WAN) is a computer network that covers a large geographic area such as a city,country,or
spans even intercontinental distances,using a communications channel that
combines many types of media such as telephone lines ,cables,and air waves.A
WAN often uses transmission facilities provided by common carries,such as
telephone companies.WAN technologies generally function at the lower three
layers of the OSI reference model:the physical layer,the data link layer,and
the network layer.

所谓广域网（WAN）,就是指覆盖较大地理空间（如一个城市、一个国家甚至跨大洲）、采用结合多种介质（例如电话线、有线电缆、无线电波等等）信道所组成的计算机网络.WAN通常采用公共的传输设施,例如电话公司所提供的设施.WAN技术一般针对OSI参考模型的低三层：物理层、数据链路层以及网络层.

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