Which OSPF network types are compatible and allow communication through the two peering devices?
Click on the arrows to vote for the correct answer
A. B. C. D.B.
https://www.freeccnaworkbook.com/workbooks/ccna/configuring-ospf-network-typesOSPF (Open Shortest Path First) is a link-state routing protocol that is widely used in enterprise networks. It uses cost as a metric to determine the shortest path to a destination network.
OSPF has several network types, which define how OSPF routers communicate with each other. The compatibility of OSPF network types is important because it affects how OSPF routers can form adjacencies and exchange routing information.
The given question asks about the OSPF network types that are compatible and allow communication through two peering devices. The answer is (D) broadcast to point-to-point.
Let's understand each of the given options and why option (D) is the correct answer:
A. Point-to-multipoint to nonbroadcast: In this network type, one router is designated as the hub, and the other routers are spokes. The hub sends multicast traffic to all spokes, but the spokes only send unicast traffic to the hub. This network type is not compatible with nonbroadcast networks because nonbroadcast networks do not support multicast traffic.
B. Broadcast to nonbroadcast: In this network type, the routers send multicast traffic to all other routers on the network. Nonbroadcast networks do not support multicast traffic, so this network type is not compatible with nonbroadcast networks.
C. Point-to-multipoint to broadcast: In this network type, one router is designated as the root, and all other routers are leaves. The root sends multicast traffic to all leaves, and the leaves send multicast traffic to the root. This network type is not compatible with point-to-point networks because there is no root in point-to-point networks.
D. Broadcast to point-to-point: In this network type, each router is connected to another router using a point-to-point link. The routers send multicast traffic to each other over this link. This network type is compatible with point-to-point networks because each router is directly connected to only one other router.
In conclusion, option (D) is the correct answer because OSPF routers using the broadcast to point-to-point network type can communicate with each other through two peering devices.