The ABR must have multiple interfaces connected to the backbone areA
An ABR is a router with two interfaces, each connected to a different nonbackbone areA
The only requirement to be considered an ABR is at least one interface connected to the backbone areA
An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
第1题：
A. Routers cannot redistribute external routes into the area.
B. Routers should have zero Type 3 LSAs in their LSDBs.
C. Routers should have zero Type 5 LSAs in their LSDBs.
D. Routers should learn default routes from the ABRs attached to the area.
第2题：
A. On the ABR router ospf 10 area 3 stub
B. On all Area 3 routers router ospf 10 area 3 stub
C. On all Area 3 routers router ospf 10 area 3 stub no - summary
D. On the ABR router ospf 10 area 3 nssa
E. On the ABR rou ter ospf 10 area 3 stub no - summary
第3题：
An OSPF non-backbone area allows external routes to be flooded within the area. These externalroutes are propagated into other areas. However, external routes from other areas are not allowed to enter this area. Which type of OSPF area does this describe?（）
A. stub area
B. transit area
C. border area
D. not-so-stubby area
第4题：
Which of the following are true statements regarding the characteristics of OSPF areas? Select all that apply.（）
第5题：
Which description regarding OSPF Network LSAs is correct?（）
第6题：
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
第7题：
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）
第8题：
A.A
B.B
C.C
D.D
第9题：
Which three statements about OSPF areas are true?（）
第10题：
Which statement about OSPF authentication is true？（）