What will the destination address be in the frame when it leaves host A?

When a frame leaves host A, it typically contains the MAC address of the device it is trying to communicate with as the destination address in the frame. In most cases, this is the MAC address of the next hop, which could be a switch or another network device depending on the network topology.

In this scenario, if the provided answer is BB:BB:BB:BB:BB:BB, this means that host A is sending a frame specifically to the device with the MAC address of BB:BB:BB:BB:BB:BB. This address would be used by the sending host to direct the frame to the correct destination on the local network.

The context behind the other addresses likely pertains to different devices in the network. For example, AA:AA:AA:AA:AA:AA may represent another device in the network, while FF:FF:FF:FF:FF:FF is a special broadcast address used to send frames to all devices in the local network segment. Thus, when the frame is sent, it accurately reflects the intended recipient's MAC address as destination within the frame. The answer should reflect the intended destination that exists within the relevant context of the network environment.