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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 service

题目

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）
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相似问题和答案

第1题：

The diffserv approach to providing QoS in networks employs a small,well-defined set of building blocks from which you can build a variety of( ).Its aim is to define the differentiated services(DS)byte,the Type of Service(ToS)byte from the Internet Protocol Version 4( )and the Traffic Class byte from IP Version 6,and mark the standardized DS byte of the packet such that it receives a particular forwarding treatment,or per- hop behavior(PHB),at each network node.The diffserv architecture provides a( )within which service providers can offer customers a range of network services,each differentiated based on performance.A customer can choose the(________ )level needed on a packet-by-packet basis by simply marking the packet's Differentiated Services Code Point(DSCP)field to a specific value.This ( ) specifies the PHB given to the packet within the service provider network。横线处应选（ ）


A.performance
B. Secure
C. privacy
D.data


答案：A
解析：
在网络中提供QoS的差分服务应用了一种很小的明确定义的构建模块集合来建立各种服务。它的目的就是利用IPv4头部中的服务类型(ToS )和IPv6中的通信类型定义不同的服务字节(DS)，而且在每一个网络节点用分组的标准化DS字节来表示它接收到一种特殊的转发处理规则或每跳的行为(PHB)。差分服务体系结构提供了一种框架，使得可以为用户提供一定范围的网络服务，每种服务都有不同的性能。用户只要给分组的差分服务码点(DSCP)字段赋予特殊的值，就可以按照各个分组的需要选择性能级别。这个值说明了在服务提供的网络中给予分组的PHB 。

第2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

正确答案:B,D,E

第3题：

The diffserv approach to providing QoS in networks employs a small, well-defined set of building blocks from which you can build a variety of( ). Its aim is to define the differentiated services (DS) byte, the Type of Service (ToS) byte from the Internet Protocol Version 4 ( )and the Traffic Class byte from IP Version 6, and mark the standardized DS byte of the packet such that it receives a particular forwarding treatment, or per-hop behavior (PHB), at each network node. The diffserv architecture provides a( )within which service providers can offer customers a range of network services, each differentiated based on performance. A customer can choose the ( )level needed on a packet-by-packet basis by simply marking the packet&39;s Differentiated Services Code Point (DSCP) field to a specific value.This ( ) specifies the PHB given to the packet within the service provider network.

A.servicesB.UsersC.networksD.structuresA.messageB.PacketC.headerD.packageA.informationB.StructureC.meansD.frameworkA.performanceB.SecureC.privacyD.dataA. packetB.valueC.serviceD.paragraph


正确答案：A,B,C,A,B

第4题：

To ensure voice packets are kept within the Committed Information Rate （CIR） of a Frame Relaylink， what should be used in the CPE？（）

  • A、 prioritization
  • B、 classification
  • C、 fragmentation
  • D、 traffic shaping

正确答案:D

第5题：

End-to-end QoS is maintained in the Cisco WLAN deployment model by utilizing what parameter in lieu of 802.1p？（）

  • A、 IP precedence
  • B、 type of service （ToS）
  • C、 class of service （CoS）
  • D、 differentiated services code point （DSCP）

正确答案:D

第6题：

The diffserv approach to providing QoS in networks employs a small,well-defined set of building blocks from which you can build a variety of( ).Its aim is to define the differentiated services(DS)byte,the Type of Service(ToS)byte from the Internet Protocol Version 4(________)and the Traffic Class byte from IP Version 6,and mark the standardized DS byte of the packet such that it receives a particular forwarding treatment,or per- hop behavior(PHB),at each network node.The diffserv architecture provides a( )within which service providers can offer customers a range of network services,each differentiated based on performance.A customer can choose the( )level needed on a packet-by-packet basis by simply marking the packet's Differentiated Services Code Point(DSCP)field to a specific value.This ( ) specifies the PHB given to the packet within the service provider network。横线处应选（ ）

(72)A message B. Packet

C.header D. package


A. message
B. Packet
C.header
D.package

答案：C
解析：
在网络中提供QoS的差分服务应用了一种很小的明确定义的构建模块集合来建立各种服务。它的目的就是利用IPv4头部中的服务类型(ToS )和IPv6中的通信类型定义不同的服务字节(DS)，而且在每一个网络节点用分组的标准化DS字节来表示它接收到一种特殊的转发处理规则或每跳的行为(PHB)。差分服务体系结构提供了一种框架，使得可以为用户提供一定范围的网络服务，每种服务都有不同的性能。用户只要给分组的差分服务码点(DSCP)字段赋予特殊的值，就可以按照各个分组的需要选择性能级别。这个值说明了在服务提供的网络中给予分组的PHB 。

第7题：

Which of the characteristics below is associated with the （QoS） Integrated Services Model？（）

  • A、QoS classified at layer 3 using IP precedence or DSCP
  • B、Guaranteed rate service
  • C、Implemented using FIFO queues
  • D、All traffic has an equal chance of being dropped

正确答案:B

第8题：

WhichQoSmodelmanagestheQoSrequirementsforthenetworkonaper－hopbehavior(PHB)basis?()

A.best-effortdelivery

B.ingresscommittedrate（ICR）

C.shapingandpolicing

D.egresscommittedrate（ECR）

E.IntegratedServices（IntServ）

F.differentiatedservices（DiffServ）


参考答案：F

第9题：

Which of the characteristics below is associated with the （QoS） Integrated Services Model？ （）

  • A、 QoS classified at layer 3 using IP precedence or DSCP.
  • B、 Guaranteed rate service.
  • C、 Implemented using FIFO queues.
  • D、 All traffic has an equal chance of being dropped.

正确答案:B

第10题：

To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link, what should be used in the CPE?（）

  • A、prioritization
  • B、classification
  • C、fragmentation
  • D、traffic shaping

正确答案:D

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