1.数据终端设备(DTE):
它包括任何可用作二进制数字数据的源或目标的单元。在物理层,它可以是终端,微型计算机,计算机,打印机,传真机,机器或任何其他生成或使用数字数据的设备。 DTE通常不交流信息,但需要中介才能交流。
2.数据电路终端设备(DCE):
它包括通过网络以模拟或数字信号形式发送或接收数据的任何功能单元。在物理层,DCE获取DTE生成的数据,将其转换为适当的信号,然后将信号引入电信链路。
该层上常用的DCE包括调制解调器。在任何网络中,DTE都会生成数字数据并将其传递给DCE。 DCE将该数据转换为传输介质可接受的格式,然后将转换后的信号发送到网络上的另一个DCE。第二个DCE离线获取信号,将其转换为DTE可以使用的形式,然后将其传送出去。
DTE和DCE之间的区别:
SR.NO | DTE | DCE |
---|---|---|
1 | DTE stands for Data Termination Equipment. | DCE stands for Data Communication Equipment. |
2 | It is a device that is an information source or an information sink. | It is a device used as an interface between a DTE. |
3 | DTE is concerned with source or destination of data. | DCE is concerned with communications aspect of data. |
4 | It produces data and transfers them to a DCE, with essential control characters. | It converts signals to a format appropriate to transmission medium and introduces it onto network line. |
5 | It is connected through help of a DCE network. | DCE network acts as a medium for two DTE networks. |
6 | Examples of DTE include computers, printers and routers, etc. | Examples of DCE include modem, ISDN adaptors, satellites and network interface cards, etc. |