Which statement best describes the Java Virtual Machine (VM) transport?

• A. Each app in Mule instance has its own VM endpoints, communicates within the same domain, default in-memory queues but can use persistent queues
• B. VM transport routes messages across different domains by default
• C. VM transport uses HTTP as default
• D. VM transport requires external brokers

Answer: (A)

VM transport is designed for fast, in-process messaging inside a single Mule runtime. It enables apps that run in the same Mule domain to talk to each other using VM endpoints, all within the same JVM. Messages are held in memory by default, which makes this path very quick. If you need durability across restarts, you can configure persistent queues so messages are stored to a backing store. Because it stays inside the JVM, there’s no cross-domain or external broker involvement, and it isn’t based on HTTP by default.