2V0-41.24 Question 84
Single answerAn organization is deploying VMware NSX-T Data Center and wants to optimize the handling of Broadcast, Unknown Unicast, and Multicast (BUM) traffic within a logical switch. Which mechanism is used by NSX-T to manage BUM traffic in an overlay network?
- A
Multicast replication in the physical network
- B
Unicast replication mode using the NSX-T transport nodes
- C
Flooding the BUM traffic to all transport nodes without filtering
- D
Hybrid replication mode combining physical and logical replication
Show answer and explanation
Correct answer: B
Explanation
NSX-T primarily uses unicast replication mode by default to handle BUM traffic in overlay networks. This mode ensures that traffic is only replicated to the transport nodes that require it, thereby optimizing efficiency and avoiding unnecessary overhead. While multicast and hybrid modes are supported, they are not the default, nor are they as commonly used as unicast replication in modern NSX-T deployments.
- A. Incorrect.
Multicast replication in the physical network is not used by default in NSX-T as it requires physical network configuration and is generally avoided in modern deployments.
- B. Correct.
Unicast replication mode ensures that the NSX-T transport nodes handle BUM traffic efficiently by replicating traffic only to the necessary nodes, optimizing performance and avoiding unnecessary flooding.
- C. Incorrect.
Flooding the BUM traffic to all transport nodes is inefficient and not used by NSX-T, as it would lead to excessive network overhead.
- D. Incorrect.
Hybrid replication mode is a valid option in NSX-T but is not the default mechanism. It combines both physical and logical replication when explicitly configured.