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判断题
Qos技术汇中的简单流分类是指采用简单的规则,比如ip报文中的DSCP值.MPLS报文中的EXP值.VLAN报文头中的802.1p值对报文进行简单的分类。
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更多 “判断题Qos技术汇中的简单流分类是指采用简单的规则,比如ip报文中的DSCP值.MPLS报文中的EXP值.VLAN报文头中的802.1p值对报文进行简单的分类。A 对B 错” 相关考题
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。
考题
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
考题
如下描述中,QOS对于MPLS标签中EXP字段的处理的原则正确的是()
A.给IP报文封装MPLS标签时,直接将IP报文的TOS字段转换成MPLS标签的EXP字段B.标签交换(swap)操作时,EXP字段保持不变C.标签压栈(push)操作时,新压入的外层标签EXP字段继承内层标签的EXP字段D.标签弹栈(pop)操作时,如果弹栈之后是MPLS报文,不会将弹出标签的EXP字段复制到内层标签上;如果弹栈之后为IP报文,不会将EXP字段复制到IP报文的TOS字段
考题
关于MPLS协议,以下说法正确的有:()A、MPLS报文中标签的长度为20比特;B、MPLS报文位置介于IP报文与UDP报文之间C、MPLS支持IP、IPv6协议,同时也支持IPX协议D、MPLS报文理论上可以无限制嵌套
考题
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.
考题
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.
考题
以下关于MPLS QOS描述正确的是()。A、根据需要在CE上或PE上对业务进行分类,对分类后的流量进行流量监管、重新标记EXP等B、如果原来IP报文携带了IP优先级,不能把其映射到标签的EXP域C、在P路由器和PE路由器之间,根据标签的EXP域进行有差别的QOS传送D、MPLS QOS进行有差别的队列调度包括PQ和CQ,但不包括CBQ
考题
单选题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
考题
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
考题
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.
考题
多选题如下描述中,QOS对于MPLS标签中EXP字段的处理的原则正确的是()A给IP报文封装MPLS标签时,直接将IP报文的TOS字段转换成MPLS标签的EXP字段B标签交换(swap)操作时,EXP字段保持不变C标签压栈(push)操作时,新压入的外层标签EXP字段继承内层标签的EXP字段D标签弹栈(pop)操作时,如果弹栈之后是MPLS报文,不会将弹出标签的EXP字段复制到内层标签上;如果弹栈之后为IP报文,不会将EXP字段复制到IP报文的TOS字段
考题
单选题关于MPLS转发流程中Transit节点转发的描述正确的是()。A
根据MPLS的标签值查看对应的FIB表,可以得到TokenB
根据FIB表的Token找到对应的NHLFE表项C
查看NHLFE表项,可以得到出接口、下一跳、出标签和标签操作类型D
如果标签值为1,则直接弹出标签,同时处理EXP和TTL,然后进行IP转发或下一层标签转发E
如果标签值=15,则用新标签替换MPLS分组报文中的旧标签,同时处理EXP和TTL,然后将替换完标签的MPLS分组报文发送给下一跳
考题
问答题IP报文中一部分字段专门用来描述报文的生命周期,即TTL值,它的最大值是______。
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