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.
Answer: A, D, E