Which three QoS̳

第1题：

Which three statements are true about the application of QoS models？ （）

• A、 The DiffServ model requires applications to signal the network with QoS requirements.
• B、 The DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addresses.
• C、 The DiffServ model requires RSVP.
• D、 The best effort model is suitable for applications such as file transfer and e-mail
• E、 The IntServ model requires applications to signal the network with QoS requirements.
• F、 The IntServ model attempts to deliver a level of service based on the QoS specified by each packet

第2题：

Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature （QoS pre-classify） provides packet classification and applies appropriate QoS service on tunnel interfaces？（）

• A、IP precedence bits
• B、DSCP bits
• C、original port numbers
• D、DE bits
• E、source IP address
• F、destination IP address

第3题：

What is the three main step of using the QoS feature with MQC command line interface？

第4题：

Which two statements about the QoS policy generation phase of the Cisco SDM QoS wizard are true？（）

• A、the SDM QoS wizard will create two real-time traffic classes to handle VoIP， voice signaling， and video packets
• B、the SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， video， and video packets
• C、the SDM QoS wizard will create four real-time traffic classes to handle VoIP， voice signaling， video， and video streaming packets
• D、the SDM QoS wizard will create two business-critical traffic classes to handle transactional and  network management packets
• E、the SDM QoS wizard will create three business-critical traffic classes to handle transactional， network management， and routing packets
• F、the SDM QoS wizard will create four business-critical traffic classes to handle transactional， network management， routing， and best-effort packets

第5题：

Which three practices are important to the implementation of a DiffServ QoS architecture？（）

• A、 Because services are allocated throughout the network before the transmission of data begins， traffic classes can be guaranteed QoS services.
• B、 Traffic classes are marked with Layer 2 markings to allow for more granularity in identifying traffic classes.
• C、 Traffic classes are marked with Layer 3 markings to allow them to traverse different network types without loss of QoS information.
• D、 Traffic classes allow networks to provide proper QoS treatment of packets without applications having to request services.
• E、 Based upon the network capabilities， QoS markings are placed on packets as needed throughout the network to allow for proper QoS treatment of packets.
• F、 QoS markings are placed on packets as close to the network edge as possible to allow distribution and core devices to determine QoS actions as quickly as possible.

第6题：

Cisco AutoQoS takes the interface type and bandwidth into consideration when configuring which three QoS features？（）

• A、voice compression methodology
• B、LLQ
• C、CRTP
• D、routing protocol
• E、LFI
• F、trust boundary

第7题：

Which three of the following network features are methods used to achieve high availability（）

• A、Spanning Tree Protocol（STP）
• B、Delay reduction
• C、Hot Standby Routing Protocol（HSRP）
• D、Dynamic routing protocols
• E、Quality of Service（QoS）
• F、Jitter management

第8题：

When you design QoS on CE for an MPLS Layer 2 VPN， which three things should be considered？（）

• A、Layer 2 access link QoS design
• B、enterprise-to-service-provider mapping models
• C、Layer 3 link access QoS design
• D、service provider service level agreements
• E、Layer 2 link access load balancing

第9题：

Which three traffic descriptors are typically used as QoS markings for packets or frames entering the network？（）

• A、protocol type
• B、CoS
• C、DSCP
• D、IP precedence
• E、destination address
• F、input interface

第10题：

Which three WLC items are required to properly enable queuing with TSPEC for voice traffic?（）

• A、configure WLAN setting to enable WMM
• B、configure WLAN Aironet information elements enabled
• C、configure global 802.11b/g or 802.11a，or both，voice CAC
• D、configure WLAN QoS Platinum
• E、configure DTIM = 2