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單項選擇題

Which of the following network devices should be installed at a data center to intelligently distribute client connections to a pool of servers?（）

A. A proxy server
B. A load balancer
C. A layer two switch
D. A multilayer switch

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單項選擇題

Which of the following attacks occurs when a hijacker intercepts traffic, modifies it, then sends thetraffic?（）

A.DoS
B.Smurf
C.Man-in-the-middle
D.Phishing

單項選擇題

Which of the following is the BEST network device to allow multiple network connections to beterminated in one spot?（）

A. A patch panel
B. A 66 block
C. A smart jack
D. A cross connect