单项选择题
Which of the following answers can be verified as true based on the following command output from Router R1?（）
R1#show ip ospf virtual - links
Virtual Link OSPF_VL0 to router 4.4.4.4 is up
Run as demand circuit
DoNotAge LSA alloweD.
Transit area 1, via interface FastEthernet0/1, Cost of using 3
A. R1 is configured with an area 0 virtual - link 4.4.4.4 cost 3 command.
B. The ping 4.4.4.4 command on R1 must currently be successful.
C. R1's Fa0/0 OSPF cost is 3.
D. 4.4.4.4 is known to R1 based on a Type 1 LSA in area 1.
相关考题
-
单项选择题
ABR R1 has been configured with an area 1 stub no - summary command. Which stubby area type is area 1?（）
A. Stub
B. Totally stubby
C. NSSA
D. Totally NSSA -
多项选择题
Which of the following is true about routers internal to a totally NSSA area?（）
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. -
单项选择题
Router R1, an ASBR connected to the Internet and to backbone area 0, has been configured with a default - information originate command. Which of the following is true about the effects of this configuration command?（）
A. R1 will always create and flood a default route into the OSPF domain.
B. R1 will create and flood an LSA for prefix/length 0.0. 0.0/0 into the OSPF domain if R1's IP routing table has a route to 0.0.0.0/0.
C. R1 will set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, regardless of whether R1 has a default route.
D. R1 w ill set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, but only if R1 has a route to 0.0.0.0/0.
