300-410 Question 101
Single answerA network engineer is configuring an OSPF network for a company. The network consists of multiple routers connected via Frame Relay. The engineer wants to avoid unnecessary OSPF traffic, such as multicast updates, since the Frame Relay network does not support broadcast. Which OSPF network type should the engineer configure on the Frame Relay interfaces?
- A
Point-to-point
- B
Broadcast
- C
Nonbroadcast
- D
Point-to-multipoint
Show answer and explanation
Correct answer: C
Explanation
When configuring OSPF on a Frame Relay network that does not support broadcasting, the 'Nonbroadcast' OSPF network type is the most appropriate. This mode avoids multicast updates and requires manual neighbor configuration, which is ideal in this scenario. Other options either do not align with the characteristics of a Frame Relay network or do not meet the objective of minimizing OSPF traffic.
- A. Incorrect.
Point-to-point is used for direct connections between two routers. While it minimizes OSPF traffic, it is not suitable for a Frame Relay network with multiple connections.
- B. Incorrect.
Broadcast is used when the underlying network supports broadcasting, such as Ethernet. Frame Relay does not inherently support broadcast, making this option unsuitable.
- C. Correct.
Nonbroadcast is appropriate for networks like Frame Relay where broadcasting is not supported. In this mode, OSPF requires manual neighbor configuration, which avoids multicast traffic.
- D. Incorrect.
Point-to-multipoint is used for scenarios where the network supports multiple destinations, but it still allows multicast traffic. This does not align with the goal of avoiding multicast traffic in the given scenario.