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
第1题:
A.Packet-basedswitchingdevices
B.VPI/VCI-basedswitchingdevices
C.Non-Packet-baseddevices
D.Noneoftheabove
E.AandB
第2题:
下列选项中,哪个正确的描述了数据封装的顺序
A.Data, frame, packet, segment, bit
B.Segment, data, packet, frame, bit
C.Data, segment, packet, frame, bit
D.Data, segment, frame, packet, bit
第3题:
OSI七层模型在数据封装时正确的协议数据单元排序是:
A.packet、frame、bit、segment
B.frame、bit、segment、packet
C.segment、packet、frame、bit
D.frame、packet、segment
第4题:
A.New
B.One-Way
C.Initializing
D.Up
第5题:
OSPF是一种典型的链路状态(Link-state)的路由协议。()
第6题:
32、OSPF通过()报文来建立并维护邻居关系。
A.Hello
B.Open
C.Keepalive
D.Update