单选题In IS-IS, how long will the restart helper keep the restarting router in the up state?（）A until the hello dead timer expiresB until the restart duration timer expiresC until the restarting router sets the down bitD until the restart helper sends out th

题目
单选题
In IS-IS, how long will the restart helper keep the restarting router in the up state?（）
A

until the hello dead timer expires

B

until the restart duration timer expires

C

until the restarting router sets the down bit

D

until the restart helper sends out three CSNPs

相似考题

1.What is the purpose of the RSVP hello interval?()A. It is the size of the RSVP hello packetB. It is how long it maintains RSVP neighborsC. It is the length of time between RSVP hello packetsD. It is how long the router waits before declaring a router to be down

2.You are investigating routing problems on a device running the Junos OS. You receive the error shown in the exhibit when you attempt to restart the routing process.Which statement describes the problem?（）A. You have typed an invalid command.B. You must be in configuration mode to restart the routing process.C. You do not have permission to restart the routing process.D. You must wait until close of business to restart the routing process, based on user-defined policy.

3.Refer to the exhibit. Which statement is co rrect regarding the router configuration shown? ()A. The router will rebroadcast any DHCP requests received by this interface out to all interfaces included in the ip helper - address commands.B. The router will rebroadcast any UDP broadcasts received by this interface out to all interfaces included in the ip helper - address commands.C. The router will unicast any DHCP requests received by this interface out to all addresses included in the ip helper - address commands.D. This configuration will not do anything because the ip helper - address command needs to also be applied to the 192.168.23.1 IP address.

4.Within IS－IS, the restart helper performs which task?()A. It sends CSNPs to the restarting router.B. It periodically sends TLV 211 to the restarting router.C. It informs other routers in the domain that a router has restarted.D. It tears down adjacency and sends its entire database after 30 seconds.

参考答案和解析
正确答案： B
解析： 暂无解析
更多“单选题In IS-IS, how long will the restart helper keep the restarting router in the up state?（）A until the hello dead timer expiresB until the restart duration timer expiresC until the restarting router sets the down bitD until the restart helper sends out th”相关问题

  • 第1题：

    A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?()

    A. It immediately sends its entire routing table to its neighbors.

    B. EIGRP sends a Hello packet to the DR to inform it of the route failure.

    C. It automatically forwards traffic to a fallback default route until a successor route is found.

    D. It sends queries out to neighbors until a new successor route is found.

    E. It places the route in holddown until LSA updates inform it of a new route to the network.


    参考答案：D

  • 第2题：

    In which two ways does the BGP graceful restart capability preserve prefix information during a restart？（）

    • A、The peer router sends an end-of RIB message to the restarting router
    • B、The peer router immediately removes the BGP routes that it learned from the restarting router from its BGP routing table
    • C、The restarting router does not remove any stale prefixes after the timer for stale entries expires
    • D、The router establishes BGP sessions with other routers and relearns the BGP routes from other routers that are also capable of graceful restart. The restarting router waits to receive updates from the neighboring routers. When the neighboring routers send end-of-RIB messages to indicate that they are done sending updates， the restarting router starts sending its own updates
    • E、The restarting router removes any stale prefixes after the timer for stale entries expires

    正确答案:D,E

  • 第3题：

    What are the two benefits of graceful restart？（）

    • A、Graceful restart allows session information recovery without disruption to the network.
    • B、A node can perform a graceful restart to help a neighbor recover its state. The label bindings are kepton state information， which helps the failed node recover faster and does notaffect the current for wardtraffic.
    • C、Graceful restart allows a node to recover state from its neighbor when there is no RP or before thedevice undergoes SSO.
    • D、Graceful restart does not allow session information recovery.
    • E、During a graceful restart， the router removes any stale prefixes after a timer for stale entries expires

    正确答案:A,B

  • 第4题：

    What is the function of the helper router during a restart event in OSPF?（）

    • A、Sends Rapid Hellos to the restarting router.
    • B、Maintains Adjancency with restarting router.
    • C、Sends periodic DD packets to the restarting router.
    • D、Floods Type 9 LSAs to all routers indicating a restarting event.

    正确答案:B

  • 第5题：

    Within IS-IS, the restart helper performs which task?（）

    • A、It sends CSNPs to the restarting router.
    • B、It periodically sends TLV 211 to the restarting router.
    • C、It informs other routers in the domain that a router has restarted.
    • D、It tears down adjacency and sends its entire database after 30 seconds.

    正确答案:A

  • 第6题：

    In IS-IS， how long will the restart helper keep the restarting router in the up state？（）

    • A、The hello dead timer expires.
    • B、The restart duration timer expires.
    • C、The restarting router sets the down bit.
    • D、The restart helper sends out three CSNPs.

    正确答案:B

  • 第7题：

    You work as a database administrator for Certkiller .com. Your database is configured for automatic undo management. UNDO_RETENTION is set to 3 hours. You want to flash back a table that was created last year. How far back can the flashback query go？ （）

    • A、3 hours
    • B、6 months
    • C、until last year
    • D、until last commit
    • E、until the point when the undotablespacewas refreshed
    • F、until the database is shut down and the memory erased

    正确答案:A

  • 第8题：

    单选题
    What is the purpose of the RSVP hello interval?（）
    A

    It is the size of the RSVP hello packet

    B

    It is how long it maintains RSVP neighbors

    C

    It is the length of time between RSVP hello packets

    D

    It is how long the router waits before declaring a router to be down


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    In IS-IS, how long will the restart helper keep the restarting router in the up state?（）
    A

    until the hello dead timer expires

    B

    until the restart duration timer expires

    C

    until the restarting router sets the down bit

    D

    until the restart helper sends out three CSNPs


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    What is the function of the helper router during a restart event in OSPF?（）
    A

    Sends Rapid Hellos to the restarting router.

    B

    Maintains Adjancency with restarting router.

    C

    Sends periodic DD packets to the restarting router.

    D

    Floods Type 9 LSAs to all routers indicating a restarting event.


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    How does route poisoning work with holddown timers to prevent routing loops?（）
    A

    Information learned from one source is not distributed back to that source.

    B

    Routing updates from the poisoned source are ignored until a holddown timer expires.

    C

    Failed routes are advertised with infinite metrics.

    D

    New routing updates are ignored until the network has converged.

    E

    A route is marked as unavailable when its time-to-live is exceeded.


    正确答案： D
    解析： 暂无解析

  • 第12题：

    多选题
    In which two ways does the BGP graceful capability preserve prefix information during a restart？（）
    A

    The peer router immediately removes the BGP routers that it learned from the restarting router from itsBGP routing tables.

    B

    The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router waits to receive updates from the neighboringrouters. When the neighboring routers send end-of-RIB messages to indicate that they are donesending updates，the restarting router starts sending its own updates.

    C

    The peer router sends an end-of-RIB message to the restarting router.

    D

    The restarting router removes any stale prefixes after the timer for stale entries expires.

    E

    The restarting router does not remove any stale prefixes after the timer for stale entries expires.


    正确答案： B,D
    解析： 暂无解析

  • 第13题：

    What best describes for how long a gas-free test is good ________．

    A.For as long as is indicated on the gas-free certificate

    B.For the instant that it is made

    C.Until valves in line with the tank or compartment are reopened

    D.Until changes in temperature or pressure affect the vapor content in the space


    正确答案：B

  • 第14题：

    How does route poisoning work with holddown timers to prevent routing loops?（）

    • A、Information learned from one source is not distributed back to that source.
    • B、Routing updates from the poisoned source are ignored until a holddown timer expires.
    • C、Failed routes are advertised with infinite metrics.
    • D、New routing updates are ignored until the network has converged.
    • E、A route is marked as unavailable when its time-to-live is exceeded.

    正确答案:C

  • 第15题：

    What is the purpose of the RSVP hello interval?（）

    • A、It is the size of the RSVP hello packet
    • B、It is how long it maintains RSVP neighbors
    • C、It is the length of time between RSVP hello packets
    • D、It is how long the router waits before declaring a router to be down

    正确答案:C

  • 第16题：

    In which two ways does the BGP graceful capability preserve prefix information during a restart？（）

    • A、The peer router immediately removes the BGP routers that it learned from the restarting router from itsBGP routing tables.
    • B、The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router waits to receive updates from the neighboringrouters. When the neighboring routers send end-of-RIB messages to indicate that they are donesending updates，the restarting router starts sending its own updates.
    • C、The peer router sends an end-of-RIB message to the restarting router.
    • D、The restarting router removes any stale prefixes after the timer for stale entries expires.
    • E、The restarting router does not remove any stale prefixes after the timer for stale entries expires.

    正确答案:B,D

  • 第17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18题：

    In IS-IS, how long will the restart helper keep the restarting router in the up state?（）

    • A、until the hello dead timer expires
    • B、until the restart duration timer expires
    • C、until the restarting router sets the down bit
    • D、until the restart helper sends out three CSNPs

    正确答案:B

  • 第19题：

    Your archive-log destination directory runs out of space. What is the impact of this on the database?（）

    • A、None. The database will switch over to the stand-by archive-log destination directory. 
    • B、A warning message will be written to the alert log of the database, but no adverse impacts to the database will be experienced. 
    • C、The database will shut down, and will not restart until you correct the out-of-space situation. 
    • D、The database will continue to try to write to the archive-log destination directory for one hour. After one hour, the database will shut down normally. 
    • E、Once Oracle has cycled through all online redo logs, it will stop processing any DML or DDL until the out-of-space condition is corrected.

    正确答案:E

  • 第20题：

    单选题
    In IS-IS， how long will the restart helper keep the restarting router in the up state？（）
    A

    The hello dead timer expires.

    B

    The restart duration timer expires.

    C

    The restarting router sets the down bit.

    D

    The restart helper sends out three CSNPs.


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    Within IS-IS, the restart helper performs which task?（）
    A

    It sends CSNPs to the restarting router.

    B

    It periodically sends TLV 211 to the restarting router.

    C

    It informs other routers in the domain that a router has restarted.

    D

    It tears down adjacency and sends its entire database after 30 seconds.


    正确答案： A
    解析： 暂无解析

  • 第22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23题：

    单选题
    A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?（）
    A

    It immediately sends its entire routing table to its neighbors.

    B

    EIGRP sends a Hello packet to the DR to inform it of the route failure.

    C

    It automatically forwards traffic to a fallback default route until a successor route is found.

    D

    It sends queries out to neighbors until a new successor route is found.

    E

    It places the route in holddown until LSA updates inform it of a new route to the network.


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    Your archive-log destination directory runs out of space. What is the impact of this on the database？（）
    A

     None. The database will switch over to the stand-by archive-log destination directory.

    B

     A warning message will be written to the alert log of the database，but no adverse impacts to the database will be experienced.

    C

     The database will shut down，and will not restart until you correct the out-of-space situation.

    D

     The database will continue to try to write to the archive-log destination directory for one hour. After one hour，the database will shut down normally.

    E

     Once Oracle has cycled through all online redo logs，it will stop processing any DML or DDL until the out-of-space condition is corrected.


    正确答案： C
    解析： 暂无解析

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