多选题Which of the following describes the roles of devices in a WAN? （）AA CSU/DSU terminates a digital local loopBA modem terminates a digital local loopCA CSU/DSU terminates an analog local loopDA modem terminates an analog local loopEA router is commonly considered a DTE deviceFA router is commonly considered a DCE device
多选题
Which of the following describes the roles of devices in a WAN? （）
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
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多选题Which of the following describes the roles of devices in a WAN? (Choose three.)（）AA CSU/DSU terminates a digital local loop.BA modem terminates a digital local loop.CA CSU/DSU terminates an analog local loop.DA modem terminates an analog local loop.EA router is commonly considered a DTE device.FA router is commonly considered a DCE device.
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多选题Which of the following describes the roles of devices in a WAN?（）AA CSU/DSU terminates a digital local loopBA modem terminates a digital local loopCA CSU/DSU terminates an analog local loopDA modem terminates an analog local loopEA router is commonly consideredaDTEdeviceFA router is commonly considereda DCE device
单选题Which statement about MPLS TE Fast Reroute （FRR） link protection operation is not true？（）AIt requires a next-hop backup tunnel.BThe backup tunnel terminates on the same tail-end router as the primary tunnel.CThe point of local repair （PLR） swaps the label and pushes the backup label.DThe restoration time is expected to be under 50 ms.EThe backup tunnel can have associated bandwidth capacity
单选题What is the difference between a CSU/DSU and a modem?（）AA CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.BA CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.CA CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.DA CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
多选题Which of the following describes the roles of devices in a WAN？（）AA CSU/DSU terminates a digital local loopBA modem terminates a digital local loopCA CSU/DSU terminates an analog local loopDA modem terminates an analog local loopEA router is commonly considered a DTE deviceFA router is commonly considered a DCE device
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