单选题What is the purpose of the OSPF link-state update packet?（）Adescribes a change to the OSPF hello timerBcarries one or more link-state advertisementsCestablishes and maintains neighbor relationshipsDdescribes the contents of the entire link-state database
单选题
What is the purpose of the OSPF link-state update packet?（）
A
describes a change to the OSPF hello timer
B
carries one or more link-state advertisements
C
establishes and maintains neighbor relationships
D
describes the contents of the entire link-state database
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