Data Communication and Computer Networks - Cloud Computing

Option : D
Explanation :
Cloud Pub/Sub is global managed service that provides the storage and distribution of messages.
Messages use a publish/subscribe delivery format and can be delivered either via push or pull messaging
Pub/Sub can serve as a buffer for applications as messages get processed

Option : B
Explanation :
Cloud Pub/Sub uses a publisher subscription format. Publishers are services or applications that produce messages to another application to process. When messages are placed in a topic, they will ultimately be delivered to an application or service to process via a subscription

Option : C
Explanation :
Google encrypts data at rest and in transit by default. The customer can also encrypt data with customer managed or customer supplied keys

Option : B
Explanation :
Managed services usually also manage some of the security burden rather than the user