Which device is a DTE device?
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A. B. C. D.B.
A DTE (Data Terminal Equipment) is a device that originates or generates digital data.
Out of the given options, a router is not a DTE device, as it does not originate or generate digital data but instead forwards it to the appropriate destination.
A CSU/DSU (Channel Service Unit/Data Service Unit) is a DTE device that serves as an interface between a digital data circuit and a data terminal equipment (DTE) device, such as a router. A CSU/DSU is typically used to connect to a Wide Area Network (WAN) service, such as a T1 or T3 line.
A cable modem and a DSL modem are both DCE (Data Communications Equipment) devices, which means they provide a digital communication service to a DTE device. Cable modems provide access to the internet through a cable TV network, while DSL modems provide access through a telephone network.
Therefore, the answer to the question is A. CSU/DSU.