以下关于DSCP和IP Precedence的比较的说法正确的是（）。A、DSCP可以兼容IP PrecedenceB、因为DSCP扩展了用于流分类的比特位，所以不能简单的映射到IP Precedence里面去C、DSCP包括6比特而IP Precedence包括3比特D、因为仅仅可以使用RFC定义的DSCP，DSCP在使用上比IP Precedence更受限制
以下关于DSCP和IP Precedence的比较的说法正确的是（）。
- A、DSCP可以兼容IP Precedence
- B、因为DSCP扩展了用于流分类的比特位，所以不能简单的映射到IP Precedence里面去
- C、DSCP包括6比特而IP Precedence包括3比特
- D、因为仅仅可以使用RFC定义的DSCP，DSCP在使用上比IP Precedence更受限制
相关考题：
以下对于DSCP描述正确的是()。 A.在网络入口处对分组进行分类，流量控制，设置DSCP值。B.在网络中根据DSCP值，进行队列调度，分组丢弃。C.IP报文TOS字节的前6个bit定义为DSCP值。D.DSCP的定义也向前兼容IP Precedence。
在部署Qos的时候,可以使用PBR来进行流量分类和标记,可以依据ACL定义的规则(源ip地址.目的IP地址.协议类型.端口号等)和数据包的长度范围进行分类,然后修改数据包的DSCP或IP Precedence字段进行标记。 A．错误B．正确
可以对报文的哪些信息对报文进行标记或重标记() A.ip DSCP.ip precedencE.802.1p.EXP信息B.ip Source.Destination Address.EXP信息C.MAC Address信息D.报文中的任何信息
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 configuration would make an IP SLA probe use a precedence value of 5？（）A、ip sla 1 icmp-echo 1.1.1.1 tos 160B、ip sla 1 icmp-echo 1.1.1.1 tos 20C、ip sla 1 icmp-echo 1.1.1.1 precedence 5D、ip sla 1 icmp-echo 1.1.1.1 dscp 20
DSCP value "101110" looks like which IP Precedence value to non-DiffServ compliant devices？（）A、IP Precedence 2B、IP Precedence 3C、IP Precedence 4D、IP Precedence 5E、IP Precedence 6F、IP Precedence 7
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 fieldC、 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 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.
Which four of these statements are restrictions for Frame Relay PVC bundles with QoS support for IP and MPLS？ （）A、A PVC bundle will not come up unless all the precedence， DSCP， and EXP levels are configured in thebundle.B、A PVC bundle can perform precedence and DSCP matching at the same timeC、A PVC bundle may contain no more than sixteen PVCsD、A PVC can be in only one PVC bundleE、A PVC bundle cannot perform precedence and DSCP matching at the same time.F、A PVC bundle may contain no more than eight PVCs.
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 bitsB、DSCP bitsC、original port numbersD、DE bitsE、source IP addressF、destination IP address
以下关于WFQ的说法正确的是（）。A、相同组内只能根据不同DSCP优先级分配不同队列B、相同组内只能根据不同IP优先级分配不同队列C、相同组内只能根据不同IP优先级或DSCP优先级分配不同队列D、可以使用WRED进行拥塞避免的控制E、配置WFQ功能需在系统视图下配置如下命令；QoS wfq dscp queue-length 64 queue-number 64
单选题可以对报文的哪些信息对报文进行标记或重标记（）Aip DSCP.ip precedencE.802.1p.EXP信息Bip Source.Destination Address.EXP信息CMAC Address信息D报文中的任何信息
单选题Which configuration would make an IP SLA probe use a precedence value of 3？（）Aip sla 1icmp-echo 1.1.1.1 tos 12Bip sla 1icmp-echo 1.1.1.1 tos 96Cip sla 1icmp-echo 1.1.1.1 precedence 3Dip sla 1icmp-echo 1.1.1.1 dscp 12
单选题下面对“报文标记”描述不正确的是（）A可以对报文的QoS信息字段尽心标记B可以对IP报文的DSCP.IP precedence信息进行标记C可以对vlan报文的802.1P信息进行标记D可以对报文的MAC进行标记
单选题Which traffic descriptor s can be recognized and categorized by cisco quality of service（qos）features？（）A incoming interface.outgoing interface.ip precedence.and differentiated services code P.oint（DSCP）.B Incoming interace.ip precedence.differentiated services code point（DSCP），and source or d.estination address.C Outgoing interface.ip precedence.differentiated services code point（DSCP）.and source or d.estination address.D Incoming interface .outgoing interface.ip precedence and differentiated code point s.ervices（DCPS）E Incoming interface .ip precedence .and source or destination address. F Outgoing interface.ip precedence .and source or destination address.
多选题以下关于DSCP和IP Precedence的比较的说法正确的是（）。ADSCP可以兼容IP PrecedenceB因为DSCP扩展了用于流分类的比特位，所以不能简单的映射到IP Precedence里面去CDSCP包括6比特而IP Precedence包括3比特D因为仅仅可以使用RFC定义的DSCP，DSCP在使用上比IP Precedence更受限制
多选题Which four of these statements are restrictions for Frame Relay PVC bundles with QoS support for IP and MPLS？ （）AA PVC bundle will not come up unless all the precedence， DSCP， and EXP levels are configured in thebundle.BA PVC bundle can perform precedence and DSCP matching at the same timeCA PVC bundle may contain no more than sixteen PVCsDA PVC can be in only one PVC bundleEA PVC bundle cannot perform precedence and DSCP matching at the same time.FA PVC bundle may contain no more than eight PVCs.
单选题下面对“报文标记”的描述，不正确的是（）A可以对报文的QoS信息字段进行标记B可以对IP报文的DSCP、IP Precedence信息进行标记C可以对Vian报文的802.lP信息进行标记D可以对报文的MAC进行标记
判断题在部署Qos的时候，可以使用PBR来进行流量分类和标记，可以依据ACL定义的规则（源ip地址.目的IP地址.协议类型.端口号等）和数据包的长度范围进行分类，然后修改数据包的DSCP或IP Precedence字段进行标记。A对B错
单选题You are the network administrator of an enterprise with a main site and multiple remote sites. Your networkcarries both VOIP and data traffic. You agree with your service provider to classify VOIP and data trafficaccording to the different service RFCs. How can your data and VOIP traffic be marked？（）Adata marked with DSCP AF21，VOIP marked with DSCP EFBdata marked with DSCP AF51，VOIP marked with DSCP EFCdata marked with the DE-bit. VOIP marked with the CLP-bitDdata marked with DSCP EF，VOIP marked with DSCP AF31Edata marked with IP precedence 5，VOIP marked with DSCP EF
多选题LTE业务到PTN的QoS映射分为两步，分别是（）APTN根据基站上报的DSCP进行速率QoS映射BPTN设备根据IP报文的IP DSCP和VLAN PRI映射到MPLS TCC基站根据QCI映射到IP报文的IP DSCP和VLAN PRID基站根据UE发起的期望速率上报DSCP
多选题Which two QoS classification and marking statements are true？ （）AIn a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.BIn 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.CIn an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.DThe differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.EThe 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.
单选题You are the network administrator of an enterprise with a main site and multiple remote sites. Your network carries both VOIP and data traffic. You agree with your service provider to classify VOIP and data traffic according to the different service RFCs. How can your data and VOIP traffic be marked？（）Adata marked with DSCP AF21，VOIP marked with DSCP EFBdata marked with DSCP AF51，VOIP marked with DSCP EFCdata marked with the DE-bit，VOIP marked with the CLP-bitDdata marked with DSCP EF，VOIP marked with DSCP AF31Edata marked with IP precedence 5 VOIP marked with DSCP EF
单选题DSCP value "101110" looks like which IP Precedence value to non-DiffServ compliant devices？（）AIP Precedence 2BIP Precedence 3CIP Precedence 4DIP Precedence 5EIP Precedence 6FIP Precedence 7