Which command must you enter to enable OSPFV2 in an IPV4 network?
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A. B. C. D.D
The correct answer is D. router ospf process-id.
OSPFv2 (Open Shortest Path First version 2) is a routing protocol used for Internet Protocol version 4 (IPv4) networks. To enable OSPFv2 on a router, you need to use the "router ospf process-id" command in the router configuration mode.
Here is a detailed explanation of the options provided in the question:
A. "ip ospf hello-interval seconds" is used to change the time interval between hello packets sent by OSPF routers. It is not used to enable OSPFv2 on a router.
B. "router ospfv2 process-id" is not a valid command. The correct command is "router ospf process-id" without the "v2" in the middle.
C. "router ospf value" is also not a valid command. It is incomplete and does not specify the process ID required for OSPFv2 configuration.
D. "router ospf process-id" is the correct command used to enable OSPFv2 on a router. The "process-id" is a unique number between 1 and 65,535 used to identify the OSPF process on the router. It is recommended to use the same process ID on all routers in the same OSPF area.
In summary, to enable OSPFv2 on a router in an IPv4 network, you need to use the "router ospf process-id" command in the router configuration mode.