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单选题
What is the purpose of the OSPF hello packet？（）
A
advertises reachable networks
B
acknowledges the receipt of update packets
C
establishes and maintains neighbor relationships
D
describes the contents of the link-state database
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考题
What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?()
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What is the purpose of the OSPF router ID in a OR/BOR election?（）A、It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point networkB、It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF routerC、It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access networkD、It is used to determine which interfaces will send Hello packets to neighboring OSPF routers
考题
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考题
单选题What is the purpose of the OSPF link-state update packet?（）A
describes a change to the OSPF hello timerB
carries one or more link-state advertisementsC
establishes and maintains neighbor relationshipsD
describes the contents of the entire link-state database
考题
单选题What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multi-access network?（）A
10B
40C
30D
20
考题
单选题What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?（）A
10B
40C
30D
20
考题
单选题OSPF选举DR、BDR时会使用如下的那些报文？（）。A
HELLO报文（Hello Packet）B
DD报文（Database Description Packet）C
LSR报文（Link State Request Packet）D
LSU报文（Link State Update Packet）
考题
单选题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
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