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思科认证考试

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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
正确答案:A,D,E
答案解析:
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