Which EMC product enables management for Vblock systems?

What is an accurate statement about a virtual SAN (VSAN)?

If a company has experienced a passive attack on its IT infrastructure, how is the company's security impacted?

A system has three components and all three components need to be operational for 24 hours; Monday through Friday. During a particular week, failure of component 3 occurred as follows:
-Tuesday = 8 AM to 1 PM -Thursday = 5 PM to 10 PM -Friday = 5 AM to 10 AM What is the mean time between failures on component 3 for that week?

What is an advantage of the changed block tracking backup technique?