In which three network technologies is traffic shaping used to prevent and manage congestion?()
- A、Asynchronous Transfer Mode (ATM)
- B、data-link switching (DLSw)
- C、Route Processor Redundancy (RPR)
- D、Frame Relay (FR)
- E、Metro Ethernet
- F、Multiprotocol Label Switching (MPLS)
正确答案:A,D,E
答案解析:有
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