單項選擇題

To ensure voice packets are kept within the Committed Information Rate （CIR） of a Frame Relaylink， what should be used in the CPE？（）

A. prioritization
B. classification
C. fragmentation
D. traffic shaping

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單項選擇題

Which QoS requirement applies to streaming video traffic？（）

A. one-way latency of 150 ms to 200 ms
B. jitter of 30 ms or less
C. packet loss of 2 percent or less
D. 150bps of overhead bandwidth

單項選擇題

The Cisco MDS 9000 Series Multilayer SAN Switches can help lower the total cost of ownership ofthe most demanding storage environments. By combining a robust and flexible hardwarearchitecture with multiple layers of network and storage-management intelligence， the Cisco MDS 9000 Series helps you build highly available， scalable storage networks with advanced securityand unified management. What method does the Cisco MDS 9000 Series use to support trunking？（）

A. ISL
B. VLAN Trunk
C. VoQ
D. Enhanced ISL