Cloud bursting can alleviate which of the following attacks?

A technician needs to configure a virtual NIC on a Class A IP address network. Which of the following is the default subnet mask for this network?

A real-time video-streaming company is determining the best cloud provider for high network performance, availability, and reliability requirements for the company's all-in cloud strategy. The new service should survive any regional disruption without any customer downtime. Which of the following is the BEST solution?

A cloud administrator runs a maintenance script to remove unused resources. After the maintenance has been performed, users report they can no longer access the application website. The administrator confirms the server is up and responding on the proper ports. Which of the following cleanup actions MOST likely caused the problem?

A new service request asks for all members of the finance department to have access to the accounting department's file server VMs on the private cloud environment.
Which of the following is the MOST efficient way to fulfill this service request?