单选题What is the WMM user priority of the packets going downstream to the client when the client does not support TSPEC but the Cisco WLC has ACM enabled and WLAN priority is set to Platinum?（）A backgroundB best effortC voiceD video

第1题：

What are two things that an access point （AP） does when it receives an 802.11 frame from a Wi-Fi Multimedia （WMM） client？ （）

• A、EAP-FASTEAP-FAS Access Point Protocol （LWAPP） packet is used to generate an 802.1 p priority value in the packets， which are sent to an Ethernet switch by the controllers.
• B、The AP will police the 802.1 le priority value to ensure it does not exceed the maximum value allowed for the QoS policy that is assigned to that client.
• C、Once the LWAPP packet is received， the AP generates the IEEE 802.1 p priority value.
• D、The AP will map the 802.11e priority value to the DSCP value.
• E、The AP will map the DSCP value to the outer LWAPP frame.

第2题：

What is the effect of applying the switchport trunk encapsulation dot1q command to a port on a Cisco Catalyst switch？（）

• A、By default， native VLAN packets going out this port will be tagged.
• B、Without an encapsulation command， 802.1Q will be the default encapsulation if DTP fails to negotiate a trunking protocol.
• C、The interface will support the reception of tagged and untagged traffic.
• D、If the device connected to this port is not 802.1Q-enabled， it will not be able to handle 802.1Q packets.

第3题：

What happens when a route does not match any user configured policies?（）

• A、The route is rejected.
• B、The route is accepted.
• C、The route is given a lower priority.
• D、The route is sent to the default policy.

第4题：

Which two statements about the implementation of WLAN QoS are true？（）

• A、The 802.11e standard is the IEEE 802.11 OoS WLAN standard.
• B、The Wi-Fi Multimedia （WMM） standard decreases the eight priority levels to four access categories.
• C、The Wi-Fi Multimedia （WMM） standard is a Wi-Fi Alliance standard that increases the four priority levels to eight access categories.
• D、The Wi-Fi Multimedia （WMM） standard is an IEEE standard that increases the four priority levels to eight access categories.
• E、Wireless 802.11 deploys Distributed Coordination Function （DCF）， carrier sense multiple access with collision detection （CSMA/CD）， interframe spacing， and random wait timers to avoid collisions.
• F、Wireless OoS designs and implementations commonly use Layer 3 differentiated services code point （DSCP） or Layer 2 802.1 p to ensure priority

第5题：

SDM creates a low latency queuing （LLQ） service policy with its associated classes. What are the two types of low latency queuing available using the SDM QoS 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 （CQ）， 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 （WFQ）， which classifies packets based on flows

第6题：

Which three statements are true of the Link Aggregation Control Protocol （LACP）？（）

• A、LACP is used to connect to non-Cisco devices.
• B、LACP packets are sent with the command channel-group 1 mode desirable.
• C、LACP packets are sent with the command channel-group 1 mode active.
• D、Standby interfaces should be configured with a higher priority.
• E、Standby interfaces should be configured with a lower priority.

第7题：

Which two statements about the Wi-Fi Multimedia （WMM） standard are true？（）

• A、 Lower-priority traffic is assigned short interframe wait-timers to allow higher-priority traffic access to the wireless network first.
• B、 Packets that are not assigned to a specific access category are categorized by default as the background access category.
• C、 The WMM standard was implemented after the 802.11e standard was approved to provide support for non 802.11e devices.
• D、 WMM is a Wi-Fi Alliance standard that was implemented before the 802.11e standard was approved.
• E、 WMM uses Enhanced DCF （EDCF） to stipulate fixed and random wait times for the different access classes.

第8题：

What are two ways to minimize the delay of VoIP packets that are traversing a network？ （）

• A、 Use WFQ， CBWFQ， and LLQ to prioritize delay-sensitive packets.
• B、 Use WFQ， CBWFQ， and LLQ to compress the payload.
• C、 Give TCP packets priority over UDP packets.
• D、 Use control plane policing for cRTP queuing.
• E、 Use stacker and predictor to compress the payload.

第9题：

What standard is WMM based on?（）

• A、802.11e
• B、802.11k
• C、802.11i
• D、802.11h

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第13题：

What are two ways to minimize the delay of VoIP packets that are traversing a network？（）

• A、Use WFQ， CBWFO， and LLO to prioritize delay-sensitive packets
• B、Use WFO， CBWFO， and LLO to compress the payload.
• C、Give TCP packets priority over UDP packets.
• D、Use control plane policing for cRTP queuing.
• E、Use stacker and predictor to compress the payload.

第14题：

Which statement best describes the application of link fragmentation and interleaving （LFI）？（）

• A、It compresses the Layer 2 payload and marks the packet as a high priority to be transmitted first
• B、It fragments larger packets and allows VoIP packets to be transmitted in between them.
• C、It stops the transmission of large packets when priority packets arrive.
• D、It sends high priority packets in between normal traffic packets.

第15题：

If both nodes in a chassis cluster initialize at different times, which configuration example will allow you to ensure that the node with the higher priority will become primary for your RGs other than RG0?（）

• A、[edit chassis cluster] user@host# show redundancy-group 1 { node 0 priority 200; node 1 priority 150;preempt; }
• B、[edit chassis cluster] user@host# show redundancy-group 1 { node 0 priority 200; node 1 priority 150; monitoring; }
• C、[edit chassis cluster] user@host# show redundancy-group 1 { node 0 priority 200; node 1 priority 150; control-link-recovery; }
• D、[edit chassis cluster] user@host# show redundancy-group 1 { node 0 priority 200; node 1 priority 150; strict-priority; }

第16题：

What is the purpose of the OSPF router ID in a OR/BOR election?（）

• A、It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network
• B、It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router
• C、It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network
• D、It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

第17题：

For which WMM queue is U-APSD most beneficial?（）

• A、on any of the queues
• B、AC_VO
• C、AC_VI
• D、the strict priority queue

第18题：

What are two possible root causes of the Application Subsystem going into "partial service?" （）

• A、JTAPI User problem  
• B、CTI Route Point problem  
• C、CTI Port Group problem  
• D、script problem  
• E、application problem

第19题：

Which statement is correct for the LWAPP/CAPWAP AP upstream encapsulated frame for a WMM-associated client frame that is centrally switched running v5.2?（）

• A、Wireless client WMM UP classification is translated to a wired DSCP priority.
• B、Wireless client 802.11p classification is translated to a wired DSCP priority.
• C、Wireless client WMM UP classification is translated to a wired 802.1p CoS priority.
• D、Wireless client 802.11p classification is translated to a wired 802.1p CoS priority.

第20题：

What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）

• A、QoS
• B、Centrex
• C、Packet encryption
• D、Intelligent call routing

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