更多"On point-to-point networks, OSPF he"的相关试题:
[单项选择]On point-to-point networks, OSPF hello packets are addressed to which address?（）
A. 127.0.0.1
B. 172.16.0.1
C. 192.168.0.5
D. 223.0.0.1
E. 224.0.0.5
F. 254.255.255.255
[单项选择]What kind of packets does OSPF send to keep up connectivity with its neighboring routers?（）
A. SPF packets
B. hello packets
C. keepalive packets
D. dead interval packets
E. LSU packets
[多项选择]On what kinds of networks does OSPF elect a backup designated router?（）
A. Point-to-point
B. Point to multipoint
C. Broadcast
D. Non-broadcast multi-access
[多项选择]Why do large OSPF networks use a hierarchical design？（）
A. to confine network instability to single areas of the network
B. to reduce the complexity of router configuration
C. to speed up convergence
D. to lower costs by replacing router swith distribution layer switches
E. to decrease latency by increasing bandwidth
F. to reduce routing overhead
[单项选择]Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）
A. An Adjacency is formed.
B. No IS-IS PDUs are sent
C. An Adjacency does not form.
D. An Adjacency forms but traffic is not forwarded.
[单项选择]Two Level 2 routers are exchanging Hello packets with different Area IDs. What occurs between these routers?（）
A. An Adjacency forms.
B. An Adjacency does not form.
C. An Adjacency forms but traffic is not forwarded.
D. No IS-IS PDUs are sent.
[多项选择]The OSPF Hello protocol performs which of the following tasks (Choose two.)（）。
A. It provides dynamic neighbor discovery.
B. It detects unreachable neighbors in 90 second intervals.
C. It maintains neighbor relationships.
D. It negotiates correctness parameters between neighboring interfaces.
E. Ituses timers to elect the router with the fastest links as the designated router.
F. It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
[多项选择]The OSPF hello protocol performs which of the following tasks?（）
A. It provides dynamic neighbor discovery
B. It detects unreachable neighbors in 90 second intervals
C. It maintains neighbor relationships
D. It negotiates correctness parameters between neighboring interfaces
E. It uses timers to elect the router witch the fastest links as the designated router
F. It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
[多项选择]OSPF协议Hello报文的作用有（）。
A. 建立邻居关系
B. 维持邻居关系
C. 对于接收到的LSU报文进行确认
D. 协商交换DD报文时的主从关系
[单项选择]How often are IS-IS Hello packets transmitted?（）
A. 3 seconds for DIS; 9 seconds for non-DIS
B. 9 seconds for DIS; 3 seconds for non-DIS
C. 10 seconds for DIS; 3 seconds for non-DIS
D. 10 seconds for all routers
[单项选择]On point-to-point networks, OSPF hello packets are addressed to which address?（）
A. 127.0.0.1
B. 172.16.0.1
C. 192.168.0.5
D. 223.0.0.1
E. 224.0.0.5
F. 254.255.255.255
[简答题]OSPF协议中的Hello报文的作用是什么？
[单项选择]运行OSPF协议的路由器每10秒钟向它的各个接口发送Hello分组，接收到Hello分组的路由器就知道了邻居的存在。如果在（）秒内没有从特定的邻居接收到这种分组，路由器就认为那个邻居不存在了。
A. 30
B. 40
C. 50
D. 60
