多选题Which two queuing methods are supported by outbound QoS?（） (Choose two.)Aweighted fair priorityBweighted fair queuingCweighted strict priorityDweighted strict queuing

第1题：

Which two statements about queuing mechanisms are true？ （）

• A、FIFO queuing is only appropriate for slower serial interfaces
• B、weighted fair queuing is the default queuing mechanism used for all but slower than E1 rate interfaces
• C、only one queuing mechanism type can be applied to an interface
• D、weighted fair queuing does not require the configuration of access lists to classify traffic  
• E、flow-based weighted fair queuing provides for queues to be serviced in a round-robin fashion

第2题：

What are three of the functions that AutoQoS performs when it is configured on a switch？（）

• A、synchronizes FIFO， PQ， CQ， and MDRR， with WFQ， CBWFQ， and LLQ
• B、enables strict priority queuing for voice traffic， and weighted round robin queuing for data traffic
• C、enables low latency queuing to ensure that voice traffic receives priority treatment
• D、enforces a trust boundary on switch access ports and uplinks/downlinks 
• E、modifies queue sizes as well as queue weights where required 
• F、adjusts link speeds to adapt to QoS needs

第3题：

第4题：

To have the best possible voice quality and to utilize effectively the available bandwidth， which queuing and compression mechanisms need to be used？（）

• A、class-based weighted fair queuing （CBWFQ）
• B、low latency queuing （LLQ）
• C、priority queuing （PQ） or custom queuing （CQ）
• D、Real-Time Transport Protocol （RTP） header compression
• E、TCP header compression
• F、UDP header compression

第5题：

When you decide on Campus QoS Design elements, which two statements correctly identify considerations to be taken into account?（）

• A、Voice needs to be assigned to the hardware priority queue.
• B、Voice needs to be assigned to the software priority queue.
• C、Call signaling must have guaranteed bandwidth service.
• D、Strict-priority queuing should be limited to 50 percent of the capacity of the link.

第6题：

Which three QoS mechanisms can be configured to improve VoIP quality on a converged  network？（）

• A、The use of a queuing method that will give VoIP traffic strict priority over other traffic  
• B、The use of RTP header compression for the VoIP traffic.
• C、The proper classification and marking of the traffic as close to the source as possible
• D、The use of 802.1QinQ trunking for VoIP traffic
• E、The use of WRED for the VoIP traffic

第7题：

Which two queuing methods will allow a percentage of the available bandwidth to be allocated to each queue？（）

• A、first-in， first-out queuing （FIFO）
• B、priority queuing （PQ）
• C、custom queuing （CQ）
• D、weighted fair queuing （WFQ）
• E、class-based WFQ （CBWFQ）
• F、low latency queuing （LLQ）

第8题：

第9题：

SDM creates a low latency queuing （LLO） service policy with its associated classes. What are the two types of low latency queuing available using the SDM OoS wizard？（）

• A、FIFO queuing， which provides a means to hold packets while they are waiting to exit an interface
• B、Priority queuing， which ensures a fixed amount of bandwidth
• C、Custom queuing （CO）， which provides a queuing tool that services all queues， even during times of congestion
• D、Bandwidth queuing， which ensures a minimum amount of bandwidth
• E、Weighted fair queuing （WFO）， which classifies packets based on flows

第10题：

Which two statements correctly identify considerations to take into account when deciding onCampus QoS Design elements？ （）

• A、 Voice needs to be assigned to the hardware priority queue
• B、 Voice needs to be assigned to the software priority queue
• C、 Call signaling must have guaranteed bandwidth service
• D、 Strict-priority queuing should be limited to 50 percent of the capacity of the link
• E、 At least 33 percent or the link bandwidth should be reserved tor default best effort class