OSPF stub areas are an important tool for the Network designer； which of the following two shouldbe considered when utilizing OSPF stub areas？ （）

A . Hierarchical OSPF networks need to be in one area B . Multiple OSPF areas must connect to area 0 C . Single area OSPF networks must be configured in area 1 D . Areas can be assigned any number from 0 to 63535 E . Area 0 is called the backbone area F . Each OSPF area need to be configured with a loopback interface

A . 不接收类型5的LSAs. B . 是一个思科专有的特性 C . 不接收汇聚的链路状态广播 D . 应用了路由重注入

A . The ABR must have multiple interfaces connected to the backbone areA B . An ABR is a router with two interfaces, each connected to a different nonbackbone areA C . The only requirement to be considered an ABR is at least one interface connected to the backbone areA D . An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA

A .  LSA type 1 B .  LSA type 2 C .  LSA type 3 D .  LSA type 5 E .  LSA type 7

A . 正确 B . 错误

A . Router(config)#router ospf 1 B . Router(config)#router ospf 0 C . Router(config)#router ospf area 0 D . Router(config-router)#network 192.168.16.0 0.0.0.255 area 0 E . Router(config-router)#network 192.168.16.0 0.0.0.255 0 F . Router(config-router)#network 192.168.16.0 255.255.255.0 area 0

A . Areas introduce a boundary on the link - state updates. B . Areas are logical definitions specific to any given router. C . All routers within an area have the exact link - state database. D . The calculation of the Dijkstra algorithm on a router is limited to changes within an area. E . The area designated router will always have a priority of 0.

A . it reduces the number of required OSPF neighbor adjacencies B . It reduces the types of LSAs that are generated C . It is less CPU intensive for routers in the single area D . It increases LSA response times. E . It removes the need for virtual link

A . Router（config）#router ospf 1 B . Router（config）#router ospf 0 C . Router（config）#router ospf area 0 D . Router（config-router）#network 192.168.16.0 0.0.0.255 area 0 E . Router（config-router）#network 192.168.16.0 0.0.0.255 0 F . Router（config-router）#network 192.168.16.0 255.255.255.0 area 0

A . incorrect distribute lists have been configured B . missing ip classless command C . CEF not enabled D . no default metric configured for EIGRP

A . The area cannot be a backbone area. B . Inter area routes are suppressed. C . The area has no more than 10 routers. D . No virtual links are allowed. E . No autonomous system border routers are allowed. F . Redistribution is not allowed unless the packet is changed to a type 7 packet.

A .  No virtual links are allowed. B .  The area cannot be a backbone area. C .  Redistribution is not allowed unless the packet is changed to a type 7 packet. D .  The area has no more than 10 routers. E .  No autonomous system border routers are allowed. F .  Interarea routes are suppressed.

A . Each OSPF area requires a loopback interface to be configured. B . Areas may be assigned any number from 0 to 65535. C . Area 0 is called the backbone area. D . Hierarchical OSPF networks do not require multiple areas. E . Multiple OSPF areas must connect to area 0. F . Single area OSPF networks must be configured in area 1.

A . Open-faced diamond B . Diamond with a cross C . Circle D . Rectangle

A . less frequent SPF calculations B . fewer hello packets C . smaller routing tables D . reduced LSU overhe ad E . fewer adjacencies needed

A . Interfaces will automatically detect and build adjacencies with neighbor routers B . DR and BDR elections will not occur C . DR and BDR elections will occur D . The neighbor command is required to build adjacencies E . All routers must be configured in a fully meshed topology with all other router

A . All OSPF networks require the use of multiple areas B . Multiple OSPF areas must connect to area 0 C . Single area OSPF networks must be configured in area 1 D . Areas can be assigned any number from 0 to 63535 E . Area 0 is called the backbone area F . Each OSPF area need to be configured with a loopback interface

A . Router(config)#router ospf 1 B . Router(config)#router ospf 0 C . Router(config)#router ospf area 0 D . Router(config-router)#network 192.168.16.0 0.0.0.255 area 0 E . Router(config-router)#network 192.168.16.0 0.0.0.255 0 F . Router(config-router)#network 192.168.16.0 255.255.255.0 area 0

A . 正确 B . 错误

A . Router（config）#router ospf 1 B . Router（config）#router ospf 0 C . Router（config）#router ospf  area 0 D . Router（config-router）#network 192.168.16.0 0.0.0.255 area 0 E . Router（config-router）#network 192.168.16.0 0.0.0.255 0 F . Router（config-router）#network 192.168.16.0 255.255.255.0 area 0

A . Area 0 B . NSSA C . Totally stubby D . Stu

A．不接受本地 AS 之外的路由信息，也不接受其他区域的路由汇总信息 B．不接受本地 AS 之外的路由信息，对本地 AS 之外的目标采用默认路由 C．可以接收任何链路更新信息和路由汇总信息 D．可以学习其他 AS 的路由信息，对本地 AS 中的其他区域使用默认路由

A.LSA type 1 B.LSA type 2 C.LSA type 3 D.LSA type 5 E.LSA type 7