-
Which two QoS classification and marking statements are true？（）
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.
-
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 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.
-
Which two QoS statements are true about the use of the SDM QoS wizard？ （）
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）.
-
Which two QoS classification and marking statements are true？ （）
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.
-
Which two statements about the QoS functionality of the Cisco SDM are true？（）
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
-
Which statement is NOT a key QoS recommended requirement for voice bearer traffic?（）
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.
-
Which statement is correct about the Cisco QoS SDM wizard？（）
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
-
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.
-
Which two statements are true about RSVP and the InServ QoS model？（）
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
-
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 packet
-
Which IOS QoS enhancement was created to address scalability and bandwidth guarantee issues?（）
A . DiffServ
B . IntServ
C . RSVP
D . WFQ
-
Which two statements are true about the implementation of QoS？ （）
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.
-
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
-
Which QoS model manages the QoS requirements for the network on a per-hop behavior （PHB） basis？（）
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）
-
Which two statements about the DiffServ QoS model are true？（）
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.
-
Which IOS QoS enhancement was created to address scalability and bandwidth guaranteeissues？（）
A . DiffServ
B . IntServ
C . RSVP
D . WFQ
-
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
-
Which two statements are true about the implementation of QoS？（）
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.
-
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
-
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
-
Which two statements correctly identify factors to consider when Configuring WAN QoS？（）
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
-
Which two statements about the best effort model for QoS are true？（）
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
-
Which two statements are true about the various methods of implementing QoS？（）
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.
-
Which two QoS statements are true about the use of the SDM QoS wizard？（）
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）.
