N10-004单项选择题每日一练(2019.01.18)

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1 Which of the following WAN technologies has the GREATEST latency and is not recommended for VoIP?（）

2 Which of the following is an invalid subnet mask?（）

3 Which of the following network cable types requires grounding?（）

4 Which of the following regulates the amount of network traffic a single node receives in a servercluster?（）

5 Which of the following protocols requests membership to a multicast group?（）