Which of the following statements is true regarding an Aruba Mobility Controller functioning as a layer 3 router?

The statement that the Mobility Controller is the client's default router is accurate when the controller operates as a Layer 3 device. In this configuration, the Mobility Controller can serve as the gateway for clients on the network. When clients connect to the Mobility Controller, they will send their traffic to it, making it the default router for those clients. This is an essential function for managing client traffic efficiently and enabling access to different VLANs or subnets configured in the network.

In the context of network management, having the Mobility Controller act as the client’s default router allows for effective traffic routing and management since it is positioned at the core of network operations. This ensures that all client requests and data transmissions are directed through the Mobility Controller, which can then apply policies and manage bandwidth, security, and access controls appropriately.

While the other options present scenarios or capabilities that differ from the role of a Layer 3 router, they do not accurately reflect the primary function of the Mobility Controller as the default gateway for connected clients.