单项选择题

If A customers needed to load-balance across multiple data center. which Cisco productwould the customer consider?（）

A. ACE Global Site Selector
B. Site Balancer
C. ISR Wide Area Acceleration Server
D. Nexus Site Balancer
E. ASR Virtual Balanced Network

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Is an open standard promotes interoperability among the wireless client adapters and dial-inservers from different vendors.（）

A. WEP
B. HTTP
C. SSID
D. EAP

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Internet Protocol videoconferencing (IP/VC) provides which two business benefits? （）

A. Reduced travel time for instructors responsible for different geographic sites
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单项选择题

How does a switch respond when it receives a message?（）

A. It reads the Layer-5 information and sends the message directly to the intended computer.
B. It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.
C. It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.
D. It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.