Which QoS preclassification option will require the use of the qos pre-classify command for the VPN traffic？ （）

A .  In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit. B .  In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field C .  In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values. D .  The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet. E .  The 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

A .  The SDM QoS wizard will create two real-time traffic classes to handle VoIP and voice signaling packets. B .  The SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， 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.

A .  Business-critical traffic includes VoIP and voice signaling packets. B .  SDM can be used to configure a basic QoS policy for incoming traffic on WAN interfaces and IPsec tunnels. C .  SDM can provide QoS for real-time traffic and business-critical traffic. D .  SDM creates a custom-queuing （CQ） or a priority-queuing （PQ） policy. E .  SDM creates a low latency queuing （LLQ） service policy with its associated classes. F .  When allocating bandwidth， values can be entered in either bandwidth percentage or kilobytes per second （kBps）.

A .  In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit. B .  In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field. C .  In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values. D .  The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet. E .  The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

A . the first step when using the SDM QoS wizard is to select the inbound interface on which the QoS policy must be applied B . the SDM QoS wizard can be used to optimize LAN， WAN， and VPN interfaces C . he SDM QoS wizard supports network-based application recognition （NBAR） to provide deep and stateful packet inspection D . he SDM QoS wizard will apply custom queuing and priority queuing policies to the identified interfaces E . he SDM QoS wizard will apply low latency-queuing，custom-queuing and priority-queuing policies to the identified interfaces F . to create and manage the QoS settings， the user must select the QoS wizard task under the Monitor optio

A . Voice traffic should be marked to DSCP EF per the QoS baseline and RFC3246. B . Voice traffic loss should be no more than 3%. C . One-way latency （mouth-to-ear） should be less than 150 msec. D . Average one way jitter should be targeted to less than 30 msec. E . 21-320 Kbps of guaranteed priority bandwidth is required per call depending on sample rate，codec，and layer 2 overhead.

A . the best-effort class will need to have its percentage entered in the QoS Policy Generation screen B . SDM QoS wizard provides real-time validation of application usage of WAN bandwidth C . the SDM wizard is not able to monitor QoS policing traffic D . the SDM QoS wizard is pre-installed on enterprise router

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.

A . a drawback of implementing RSVP is the requirement to migrate to a supporting routing protocol B . RSVP uses DSCP to signal QoS requirements to routers  C . RSVP is a routing protocol D . RSVP is an IP protocol that uses IP protocol ID 46， and TCP/UDP ports 3455 E . RSVP specifically provides a level of service for rate-sensitive and delay-sensitive traffic F . the flow-based approach of RSVP is ideal for large， scalable implementations such as the public internet

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 packet

A . DiffServ B . IntServ C . RSVP D . WFQ

A .  Implementing DiffServ involves the configuration of RSVP. B .  Implementing IntServ allows QoS to be performed by configuring only the ingress and egress devices. C .  Implementing IntServ involves the utilization of RSVP. D .  Traffic should be classified and marked by the core network devices. E .  Traffic should be classified and marked as close to the edge of the network as possible.

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

A . best-effort delivery B . ingress committed rate （ICR） C . shaping and policing D . egress committed rate （ECR） E . Integrated Services （IntServ） F . differentiated services （DiffServ）

A . DiffServ requires RSVP to set up a path through the network to accommodate the requested QoS. B . Network traffic is identified by class， and the level of service is chosen for each class. C . The DiffServ model relies on a fairly simple mechanism to provide QoS over a wide range of equipment. D . RSVP enables the DiffServ model to provide end-to-end QoS. E . The DiffServ model is more scalable than the IntServ model. F . The flow-based approach of the DiffServ model is ideal for large scalable implementations such as the public Internet.

A .  DiffServ B .  IntServ C .  RSVP D .  WFQ

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

A . Implementing DiffServ involves the configuration of RSVP. B . Implementing IntServ allows QoS to be performed by configuring only the ingress and egress devices. C . Implementing IntServ involves the utilization of RSVP. D . Traffic should be classified and marked by the core network devices. E . Traffic should be classified and marked as close to the edge of the network as possible.

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

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

A . Voice Traffic uses Assured Forwarding B . Voice Signaling traffic uses Assured Forwarding C . Voice Signaling traffic uses priority queuing D . Voice Traffic uses priority queuing E . Voice signaling traffic should use priority queuing with Assured Forwarding

A . delay sensitive packets are given preferential treatment B . the default policy identifies a delay sensitive class and default class C . the default policy identifies a delay sensitive class， best effort class， and default class D . the model is highly scalable E . the model is still predominant on the internet F the model provides guaranteed service

A . Cisco AutoQoS can be used repeatedly to apply a single QoS policy to multiple interfaces. B . Cisco AutoQoS includes an optional web-based GUI for automating the configuration of QoS services. C . Cisco AutoQoS provides capabilities to automate VoIP deployments. D . The auto qos global configuration command is used to configure Cisco AutoQoS. E . The Modular QoS CLI （MQC） is the best way to fine tune QoS configurations. F . The SDM QoS wizard is the fastest way to implement QoS.

A . Business-critical traffic includes VoIP and voice signaling packets. B . SDM can be used to configure a basic QoS policy for incoming traffic on WAN interfaces and IPsec tunnels. C . SDM can provide QoS for real-time traffic and business-critical traffic. D . SDM creates a custom-queuing （CQ） or a priority-queuing （PQ） policy. E . SDM creates a low latency queuing （LLQ） service policy with its associated classes. F . When allocating bandwidth， values can be entered in either bandwidth percentage or kilobytes per second （kBps）.