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下游节点在收到PATH消息以后，通过什么标记，就能分辨出该LSP是一条需要快速重路由保护的LSP（）。
- A、SE风格标记的标记
- B、局部保护标记
- C、记录标签标记
- D、保护带宽标记
参考答案
更多 “下游节点在收到PATH消息以后，通过什么标记，就能分辨出该LSP是一条需要快速重路由保护的LSP（）。A、SE风格标记的标记B、局部保护标记C、记录标签标记D、保护带宽标记” 相关考题
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当路由器收到一个LSP报文时,会与自己LSDB中对应的已有LSP进行比较:如果收到的LSP比已有的序列号(),则将这个新的LSP存入自己的LSDB中,再通过一个PSNP报文来确认此LSP,最后将这个新的LSP“泛洪”到其他邻居。
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当路由器收到一个LSP报文时,会与自己LSDB中对应的已有LSP进行比较:如果收到的LSP比已有的序列号(),则通过一个PSNP报文确认此LSP,再发送给对方自己版本的LSP,然后等待对方给自己一个PSNP报文作为应答。
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Which interface tunnel parameter allows an LSP to use a specified explicit route?()
A.path-optionB.route-optionC.explicit-path-optionD.explicit-route-option
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Given the following LSP configuration, which statement is true?（）label-switched-path lsp-xyz { to 10.200.1.1; primary path1; secondary path2; secondary path3; no-cspf; } path path1 { 10.200.10.1 strict; } path path2 { 10.200.20.1 strict; } path path3 { 10.200.30.1 loose; }A. The router will use path1 when it is available and stable.B. The router will use path3 when it is available and stable.C. The router will attempt to establish path2 only when path1 and path3 are down.D. The router will attempt to establish path1 only when path2 and path3 are down.
考题
下游自主标签发布方式和有序标签控制方式建立LSP的过程是()。
A.边缘节点发现自己的路由表中出现了新的不属于任何现有的FEC的目的地址，不会建立一个新的FEC对应B.LSP的建立过程实际就是将FEC和标签进行绑定，并将这种绑定通告LSP上的相邻LSR的过程C.出节点有可供分配的标签，则为FEC分配标签并主动向上游发出标签映射消息D.节点LSR收到标签映射消息时，它也需要在标签转发表中增加相应的条目
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如下图所示的MPLS网络中，网络中的各个路由器已经通过LDP协议完成了标记的协 商，各路由器的LIB如下表所示。现有一个IP分组Data（目的IP地址为176.15.1.4）进入 到该网络，请在图中用箭头画出该分组的标记交换路径（LSP），并以图中注释说明的方式在其LSP的各段路由上标明标记变化情况。
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如下图所示的MPLS网络中，转发等价类FEC按目的IP地址的前缀定义，网络中的各 个路由器通过LDP协议进行标记的协商。REQ（x）表示“标记请求”消息，x表示FEC; LABEL （x,y）表示“标记分配”消息，y为分配给x的标记。（a）请按照LDP协议协商建立的LSP（标记交换路径），在标记转发表中填写各个标记交换路由器的相关标记信息内容。（表中每空0.5分）(b)现有一个IP分组Data（目的IP地址为111.2.5.1 ）进入到该网络，该分组经过LER0后分组标记为（1）;经过LSR2后分组标记为（2）。（每空1分。将应填入（n）处的数字写在答题纸的对应栏内）
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MPLS的连接称为LSP（Label Switch Path标签交换通道），要建立一个LSP必须借助于信令协议，在以下各种协议中哪种可用于建立LSP。（）A、IPCPB、LCPC、LDPD、NO.7
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下面关于智能业务重路由的描述，正确的有（）.A、在智能业务进行重路由时第一个Path消息过去时就将正反向的交叉建立起来，而业务新建时第一个Path消息过去时只建立了反向交叉。B、智能业务新建出错时，只有首节点上报错误提示：路由计算失败/标签分配失败等。而在智能业务重路由时，首节点/中间节点/末节点都有可能上报重路由失败事件。C、智能业务重路由时，在出现故障的链路：上下游节点都将经过该故障链路的所有LSP的信息通过Notfiy消息直接发给首节点；一条Notify消息可以携带多条LSP的信息。D、一般智能业务进行重路由时，需要拆除老路径，一般来说在首节点产生PathTear消息往下游节点发送拆除老路径。在末节点产生Patherr消息往上游节点发送拆除老路径。
考题
MPLS的连接称为LSP（Label Switch Path标签交换通道），要建立一个LSP必须借助于信令协议，以下哪个协议可用于建立LSP？（）A、IPCPB、LCPC、LDPD、NO.7
考题
Which interface tunnel parameter allows an LSP to use a specified explicit route?（）A、path-optionB、route-optionC、explicit-path-optionD、explicit-route-option
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What is the default function of a secondary path in MPLS?（）A、to act as an equal-cost path to the primary pathB、to enable another LSP for load balancingC、to act as a diverse backup path to the primary pathD、to allow the use of explicit path selection via EROs
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What is the optimize timer on an RSVP-signaled Label-Switched Path （LSP）？（）A、the time it takes to identify the optimal path for the LSPB、the interval at which the ingress router recalculates the LSP’s pathC、the time the ingress router takes to establish the primary pathD、the maximum number of times the ingress router tries to establish the primary path
考题
What is the optimize timer on an RSVP-signaled Label-Switched Path (LSP)?（）A、The time it takes to identify the optimal path for the LSP.B、The interval at which the ingress router recalculates the LSP's path.C、The time the ingress router takes to establish the primary path.D、The maximum number of times the ingress router tries to establish the primary path.
考题
单选题MPLS的连接称为LSP（Label Switch Path标签交换通道），要建立一个LSP必须借助于信令协议，以下（）协议可用于建立LSP管理VLAN。A
IPCPB
LCPC
LDPD
NO.7
考题
单选题Given the following LSP configuration, which statement is true?（）label-switched-path lsp-xyz { to 10.200.1.1; primary path1; secondary path2; secondary path3; no-cspf; } path path1 { 10.200.10.1 strict; } path path2 { 10.200.20.1 strict; } path path3 { 10.200.30.1 loose; }A
The router will use path1 when it is available and stable.B
The router will use path3 when it is available and stable.C
The router will attempt to establish path2 only when path1 and path3 are down.D
The router will attempt to establish path1 only when path2 and path3 are down.
考题
单选题MPLS的连接称为LSP（Label Switch Path标签交换通道），要建立一个LSP必须借助于信令协议，在以下各种协议中哪种可用于建立LSP。（）A
IPCPB
LCPC
LDPD
NO.7
考题
单选题What is the optimize timer on an RSVP-signaled Label-Switched Path (LSP)?（）A
The time it takes to identify the optimal path for the LSP.B
The interval at which the ingress router recalculates the LSP's path.C
The time the ingress router takes to establish the primary path.D
The maximum number of times the ingress router tries to establish the primary path.
考题
单选题What is the role of Forwarding Equivalence Class （FEC） in MPLS？（）A
FEC determines how IP packets are forwarded in MPLS LSP.B
FEC determines how to establish an LSP path.C
FEC determines how a group of IP packets are mapped to an LSP.D
FEC determines how MPLS labels are stacked in LSP.E
None of above.
考题
单选题Two Label-Switched Paths called LSP A and LSP B have been configured on a router. LSP A has been configured with a hold-priority of 3. There is insufficient reservable bandwidth along the path to accomodate both LSPs reservation requirements. Which setup priority must LSP B have to pre-empt LSP A and use its bandwidth?（）A
2B
3C
4D
7
考题
单选题What is the optimize timer on an RSVP-signaled Label-Switched Path （LSP）？（）A
the time it takes to identify the optimal path for the LSPB
the interval at which the ingress router recalculates the LSP’s pathC
the time the ingress router takes to establish the primary pathD
the maximum number of times the ingress router tries to establish the primary path
考题
单选题What is the default function of a secondary path in MPLS?（）A
to act as an equal-cost path to the primary pathB
to enable another LSP for load balancingC
to act as a diverse backup path to the primary pathD
to allow the use of explicit path selection via EROs
考题
单选题Which configuration would allow for non-revertative LSP path failover？（）A
AB
BC
CD
D
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