Which of the following describes the roles of devices in a WAN? (Choose three.)

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QUESTION 4

Which of the following describes the roles of devices in a WAN? (Choose three.)

A. A CSU/DSU terminates a digital local loop.

B. A modem terminates a digital local loop.

C. A CSU/DSU terminates an analog local loop.

D. A modem terminates an analog local loop.

E. A router is commonly considered a DTE device.

F. A router is commonly considered a DCE device.

Correct Answer: ADE

Section: WAN

Explanation

Explanation/Reference:

Modems and CSU/DSU are considered DCE: data communications equipment, parts of the WAN itself. Routers are considered DTE: data terminating equipment,

right on the edge of the WAN and not really part of it. Modems are considered to be analog devices and terminate an analog local loop. CSU/DSU devices are

considered to be digital and terminate a digital local loop.