更多“单选题What does the LSP Holdtime field in an IS-IS database indicate?()A the LSP ageB the LSP refresh intervalC the LSP elapsed lifetimeD the LSP remaining lifetime”相关问题
  • 第1题:

    在IS-IS协议中()用于识别一个LSP的新旧。

    • A、LSP序列号
    • B、LSP剩余生存时间
    • C、LSP ID
    • D、LSP的Source ID

    正确答案:A

  • 第2题:

    Bypass LSP的建立是在以下哪个节点手工配置触发的()。

    • A、MP
    • B、PLR
    • C、主LSP头节点
    • D、主LSP尾节点

    正确答案:B

  • 第3题:

    What does the LSP Holdtime field in an IS-IS database indicate?()

    • A、the LSP age
    • B、the LSP refresh interval
    • C、the LSP elapsed lifetime
    • D、the LSP remaining lifetime

    正确答案:D

  • 第4题:

    在IS-IS的CSNP和PSNP中,利用()来描述一个具体的LSP。

    • A、LSP ID
    • B、Sequence Number
    • C、Remaining lifetime
    • D、LSP checksum

    正确答案:A,B,C,D

  • 第5题:

    在NE80E上配置MPLS时选择建立LSP的触发策略的命令是?()

    • A、系统视图下:mpls lsp-trigger
    • B、MPLS视图下:mpls lsp-trigger
    • C、系统视图下:lsp-trigger
    • D、MPLS视图下:lsp-trigger

    正确答案:D

  • 第6题:

    保护倒换1:1模式下,1条备LSP为1条主LSP提供保护。在链路状态正常的情况下备LSP上会有主LSP上的流量。


    正确答案:错误

  • 第7题:

    In IS-IS, how does the restarting router inform its helpers that a restarts event occurred?()

    • A、Sending out a graceful restart PDU
    • B、Sending an LSP that contains no TLVs.
    • C、Sending out a restarts TLV with the RR bit set.
    • D、Reflooding its LSP with a maximum sequence number.

    正确答案:C

  • 第8题:

    What is the default LSP lifetime value in JUNOS software?()

    • A、900 seconds
    • B、1200 seconds
    • C、3000 seconds
    • D、65535 seconds

    正确答案:B

  • 第9题:

    单选题
    Bypass LSP的建立是在以下哪个节点手工配置触发的()。
    A

    MP

    B

    PLR

    C

    主LSP头节点

    D

    主LSP尾节点


    正确答案: A
    解析: 暂无解析

  • 第10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.


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?()
    A

    Router A remains the DIS and generates a new pseudonode LSP for that LAN

    B

    Router A remains the DIS and NO new pseudonode LSP is generated for that LAN

    C

    Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router A

    D

    Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A


    正确答案: A
    解析: 暂无解析

  • 第12题:

    单选题
    PE1 has connections to VPN sites that are served by three remote PE routers. How many LSP’s must be established to support 2547bis?()
    A

    an LSP for each local CE device

    B

    an LSP for each remote PE device

    C

    an LSP for each remote CE device

    D

    an LSP for each CE facing interface


    正确答案: A
    解析: 暂无解析

  • 第13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.

    正确答案:C

  • 第14题:

    PE1 has connections to VPN sites that are served by three remote PE routers. How many LSP’s must be established to support 2547bis?()

    • A、an LSP for each local CE device
    • B、an LSP for each remote PE device
    • C、an LSP for each remote CE device
    • D、an LSP for each CE facing interface

    正确答案:B

  • 第15题:

    在IS-IS协议中LSP标识由那些部分组成。()

    • A、系统标识System ID
    • B、伪节点ID
    • C、LSP分片号
    • D、区域号Area ID

    正确答案:A,B,C

  • 第16题:

    在IS-IS协议中一个LSP的LSP id为00c0.0040.1234.01-02,从这里可以得到如下信息。()

    • A、这是由一个伪结点产生的LSP,伪节点ID为01
    • B、这是由一个非伪结点(普通结点)产生的LSP
    • C、这是一个被分片的LSP,该LSP的LSP编号为02
    • D、产生该LSP的System ID为00c0.0040.1234

    正确答案:A,C,D

  • 第17题:

    Bypass LSP不能同时是主LSP,LSP不能被嵌套保护。


    正确答案:正确

  • 第18题:

    What is the default value of the IS-IS lsp-refresh-interval command?()

    • A、60 seconds
    • B、5 minutes
    • C、15 minutes
    • D、30 minutes

    正确答案:C

  • 第19题:

    There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?()

    • A、Router A remains the DIS and generates a new pseudonode LSP for that LAN
    • B、Router A remains the DIS and NO new pseudonode LSP is generated for that LAN
    • C、Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router A
    • D、Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A

    正确答案:C

  • 第20题:

    PTN设备现在使用的保护倒换技术主要有2种,分别是基于G.8131定义的路径保护;基于G.8132定义的环网保护:Wrapping(环回);其中路径保护又分为LSP1+1和LSP1:1,其中,()是单向倒换,()是双向倒换。WRAPPING保护的倒换则发生在()

    • A、LSP1:1、LSP1+1、上下话业务节点;
    • B、LSP1+1、LSP1:1、上下话业务节点;
    • C、LSP1:1、LSP1+1、故障相邻的节点;
    • D、LSP1+1、LSP1:1、故障相邻的节点。

    正确答案:D

  • 第21题:

    判断题
    Bypass LSP不能同时是主LSP,LSP不能被嵌套保护。
    A

    B


    正确答案:
    解析: 暂无解析

  • 第22题:

    单选题
    What is the default value of the IS-IS lsp-refresh-interval command?()
    A

    60 seconds

    B

    5 minutes

    C

    15 minutes

    D

    30 minutes


    正确答案: C
    解析: 暂无解析

  • 第23题:

    单选题
    In IS-IS, how does the restarting router inform its helpers that a restarts event occurred?()
    A

    Sending out a graceful restart PDU

    B

    Sending an LSP that contains no TLVs.

    C

    Sending out a restarts TLV with the RR bit set.

    D

    Reflooding its LSP with a maximum sequence number.


    正确答案: A
    解析: 暂无解析

  • 第24题:

    单选题
    What does the LSP Holdtime field in an IS-IS database indicate?()
    A

    the LSP age

    B

    the LSP refresh interval

    C

    the LSP elapsed lifetime

    D

    the LSP remaining lifetime


    正确答案: C
    解析: 暂无解析