What is the purpose of the Service Bus namespace?

1. A A single queue or topic entity
2. ✓ B A container for all Service Bus entities (queues, topics) with a shared endpoint, authentication, and network settings (correct answer)
3. C A subscription within a topic
4. D A message batch

Shortcut: A Service Bus namespace is the management container and scoping boundary. All queues, topics, and subscriptions live within a namespace. The namespace provides the FQDN endpoint.