A company that provides cloud-based storage services allows user authentication using third- party social network credentials. Which of the following should be implemented to accomplish this task?

A systems administrator is trying to reduce storage consumption. Which of the following file types would benefit the MOST from compression?

Which of the following ports is used for HTTPS?

Which of the following should be implemented to ensure email continuity is not disrupted if one of multiple datacenters experiences an outage?

There has been a change in requirements for two countries where PCI virtual instances exist. As such three virtual instances need to be added in both countries' PCI environments, and two instances need to be removed.
Which of the following is the BEST way to ensure compliance is met in those two countries?