Which three statements are correct regarding the OSPF operations? line (Choose three.)
A.
PE5 OSPFv2 and OSPFv3 router id is 10.5.1.1
B.
The OSPF virtual-link cost is 1
C.
Area 3 is a transit area
D.
Area 4 is using MD5 authentication
E.
Area 1 IPv4 and IPv6 networks are not reachable from PE6
Explanation:
#show ip protocols
#show ip route ospf
#show ip ospf interfaces
#show ip ospf neighbors
#show ip ospf database
#show ip ospf border-routers
#show ip ospf
#show ip route
#show ip protocols
show ospfv3
show ospf
show ospf routes
show ospfv3 routes
0
0
R1#show ip ospf virtual-links
Virtual Link OSPF_VL0 to router 192.168.23.2 is up
Run as demand circuit
DoNotAge LSA allowed.
Transit area 1, via interface FastEthernet0/0, Cost of using 1
Verify MD5 Authentication
Use the show ip ospf interface command to view the authentication type configured for an interface, as this output shows. Here, the Serial 0 interface has been configured for MD5 authentication with key ID “1”.
0
0