單項選擇題What is high availability？（）

A. redundant infrastructure
B. clustering of computer systems
C. reduced MTBF
D. continuous operation of computing systems


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1.單項選擇題What is the purpose of IGMP in a multicast implementation？（）

A. it is not used in multicast
B. it determines the virtual address group for a multicast destination
C. it dynamically registers individual hosts in a multicast group on a specific LAN
D. it is used on WAN connections to determine the maximum bandwidth of a connection
E. it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow

2.單項選擇題Which content networking device allows bandwidth configuration settings so that streaming content will not interfere with other network traffic？（）

A. IP/TV Control Server
B. Content Distribution Manager
C. Content Engine
D. IP/TV Broadcast Server

4.多項選擇題A security analysis at The Potomac Canal Company recommends installing an IDS appliance anda firewall appliance. These appliances should connect directly into a Layer 3 switch. A loadbalancer and SSL termination have also been recommended.Potomac’s management haveexpressed concern over the cost. You suggest using integrated blades. What is one advantage and one disadvantage of yourdesign proposal？ （）

A. The data center would need several devices to achieve its goal.
B. Increased usage of standalone devices is cost-effective.
C. Using integrated blades would only require two devices.
D. Putting all security devices in a single chassis provides a single point of failure.