Which of the following reduces the amount of data that must be transmitted on a network by keeping a copy of recently transmitted data in memory?

Which of the following may be used to increase data confidentiality when encryption is not an option?

A cloud administrator for a state government agency is tasked with giving access to the voter registration application to a government agency in another state. Only authorized officials from each state should access the application. These agencies have a common environment where applications have been deployed in the past. Which of the following should the cloud administrator do to give access to the application?

Two VMs are in the same subnet 10.120.10.x/24, but the VMs cannot communicate with each other.
Which of the following could be causing this problem?

An administrator needs to make a file-level backup of a VM before deploying monthly updates. The backup should capture all changes since the last backup but should NOT reset the archive bit on any files.
Which of the following backup types BEST meets these requirements?