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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
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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.
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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.
考题
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 expiresB
until the restart duration timer expiresC
until the restarting router sets the down bitD
until the restart helper sends out three CSNPs
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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.
考题
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.
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单选题What is the function of the helper router during a restart event in OSPF?（）A
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考题
单选题In IS-IS， how does the restarting router inform its helpers that a restarts event occurred？（）A
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单选题What is the purpose of the RSVP hello interval?（）A
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It is how long the router waits before declaring a router to be down
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