单选题Which of the following network devices should be installed at a data center to intelligently distribute client connections to a pool of servers?（）AA proxy serverBA load balancerCA layer two switchDA multilayer switch
单选题
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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