Which three pre-conditions must be met before an OSPF router can perform graceful restart? （）
第1题：
A.NAT
B.BGP
C.DHCP
D.APIPA
第2题：
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
第3题：
A. Router must be an ABR.
B. Router must contain one sham link.
C. The network topology must be stable.
D. Router must be able to forward packets.
E. Neighbors must support graceful restart.
第4题：
A.As numbers must be changed to match on all the routers.
B.Loopback interface must be configured so a DR is elected.
C.The no auto-summary command is needed on Router A and Router C.
D.Router B needs to have two network statements, one for each connected network.
第5题：
A. It must be issued before the network command to enable the OSPF pr ocess for IPv6.
B. It must be issued after the network command to enable the OSPF process for IPv6.
C. It must be issued in router global configuration mode to enable the OSPF process for IPv6.
D. It must be issued in interface configuration mode to ena ble the OSPF process for IPv6.
第6题：
A. The router must have one routing protocol configured, but configuration for both routing protocols is not necessary
B. The router must hav e at least one working link connected to each routing domain
C. The redistribute command must be configured under EIGRP to send the routes to OSPF
D. The redistribute command should be configured under OSPF to take routes from EIGRP into OSPF
第7题：
Refer to the exhibit. You have completed an OSPF implementation, and you are verifying OSPF operation. You notice that router A and router B are stuck in the two - way state. From the show ip ospf interface command output, what is the cause of this issue?（）
A. All OSPF implementations must have at le ast one interface in area 0.
B. You are attempting to run in the broadcast mode over an NBMA interface.
C. Both routers are configured to function as a BDR; therefore, there is no DR router.
D. Someone has changed the OSPF router ID; therefore you must clear the OSPF process.
E. The OSPF priority is set to 0 on both routers; therefore neither can become the DR.
第8题：
A. When Area 0 is active, the loopback interface must be configured in OSPF for it to be advertised.
B. When Area 0 is active, the loopback address is automatically advertised into other areas.
C. When Area 0 is active, the OSPF router-id must match the loopback address for the loopback address to be advertised.
D. When Area 0 is active, the router-id must be configured for the loopback address to be advertised.
第9题：
A. Each end of the trunk line must be set to IEEE 802.1E encapsulation.
B. The VTP management domain name of both switches must be set the same.
C. All ports on both the switches must be set as access ports.
D. One of the two switches must be configured as a VTP server.
E. A rollover cable is required to connect the two switches together.
F. A router must be used to forward VTP traffic between VLANs.
第10题：
Which of the following are true of both OSPFv2 and OSPFv3?（）