多选题Which three statements are true about the application of QoS models？ （）AThe DiffServ model requires applications to signal the network with QoS requirements.BThe DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addresses.CThe DiffServ model requires RSVP.DThe best effort model is suitable for applications such as file transfer and e-mailEThe IntServ model requires applications to signal the network with QoS requirements.FThe IntServ model attempts to deliver a level of service based on the QoS specified by each packet
多选题
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
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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-mailE、 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
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Which QoS model manages the QoS requirements for the network on a per-hop behavior （PHB） basis？（）A、best-effort deliveryB、ingress committed rate （ICR）C、shaping and policingD、egress committed rate （ECR）E、Integrated Services （IntServ）F、differentiated services （DiffServ）
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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 protocolB、RSVP uses DSCP to signal QoS requirements to routers C、RSVP is a routing protocolD、RSVP is an IP protocol that uses IP protocol ID 46， and TCP/UDP ports 3455E、RSVP specifically provides a level of service for rate-sensitive and delay-sensitive trafficF、the flow-based approach of RSVP is ideal for large， scalable implementations such as the public internet
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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 about the DiffServ model are true？ （）A、 A class can be identified as a single application， multiple applications with similar service needs， or be based on the source or destination IP addresses.B、 A drawback of the DiffServ model is that it does not provide backward compatibility with devices that can only use the ToS field.C、 DiffServ uses the DiffServ field in the MAC header to mark frames into behavior aggregates （BAs）. D、 The DiffServ field occupies the same eight bits of the MAC header that were previously used for the ToS field.E、 The first six high-order bits of the DiffServ field are used to identify the Resource Reservation Protocol （RSVP） value.F、 The primary goal of DiffServ is scalability.
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.
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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 appliedB、the SDM QoS wizard can be used to optimize LAN， WAN， and VPN interfacesC、he SDM QoS wizard supports network-based application recognition （NBAR） to provide deep and stateful packet inspectionD、he SDM QoS wizard will apply custom queuing and priority queuing policies to the identified interfacesE、he SDM QoS wizard will apply low latency-queuing，custom-queuing and priority-queuing policies to the identified interfacesF、to create and manage the QoS settings， the user must select the QoS wizard task under the Monitor option
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多选题Which two statements are true about RSVP and the InServ QoS model？（）Aa drawback of implementing RSVP is the requirement to migrate to a supporting routing protocolBRSVP uses DSCP to signal QoS requirements to routersCRSVP is a routing protocolDRSVP is an IP protocol that uses IP protocol ID 46， and TCP/UDP ports 3455ERSVP specifically provides a level of service for rate-sensitive and delay-sensitive trafficFthe flow-based approach of RSVP is ideal for large， scalable implementations such as the public internet
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多选题Which two models are the models of DiffServ-Aware Traffic Engineering？ （）APolicy-based ModelBClass based ModelCRussian Doll ModelDGlobal Tunnel ModelEMaximum Allocation Model
多选题Which two statements about the QoS functionality of the Cisco SDM are true？（）Athe first step when using the SDM QoS wizard is to select the inbound interface on which the QoS policy must be appliedBthe SDM QoS wizard can be used to optimize LAN， WAN， and VPN interfacesChe SDM QoS wizard supports network-based application recognition （NBAR） to provide deep and stateful packet inspectionDhe SDM QoS wizard will apply custom queuing and priority queuing policies to the identified interfacesEhe SDM QoS wizard will apply low latency-queuing，custom-queuing and priority-queuing policies to the identified interfacesFto create and manage the QoS settings， the user must select the QoS wizard task under the Monitor option
多选题What are two characteristics of the DiffServ model？（）Aservice guaranteeBtraffic that is divided into classesCnot scalable to large implementationsDQoS mechanisms that are used without prior signalingEapplications that signal their particular QoS and bandwidth requirements
多选题You need to determine where the trust boundaries will be in a new Company VOIP design. Which two statements are true about these trust boundaries？（）ATrust boundaries are configured in the core of the network to provide the most efficient forwarding based upon QoS markings，BSetting trust boundaries at the edge of the network allows intermediate hop devices to administer QoS policies without detailed packet identification.CTrust boundaries are used to determine which QoS mechanism will be applied to the traffic.DAt the trust boundaries， the untrusted traffic will be marked with a new QoS value appropriate for the policy in place at the point where the traffic entered the campus network.ETrust boundaries define the firewall rules for QoS admission into a network.