The correct answer is: A. cloud and device
Communication between the cloud and device is encrypted for security. This is because the cloud is a shared resource that is accessed by multiple users. If data is not encrypted, it could be intercepted by unauthorized users.
Option B is incorrect because the end user is not directly connected to the data center. The end user’s device communicates with the cloud, which then communicates with the data center.
Option C is incorrect because the network is not directly connected to the device. The network is used to connect the device to the cloud, which then communicates with the data center.
Option D is incorrect because the cloud and network are both connected to the device. However, the data is encrypted between the cloud and device, not between the cloud and network.