A RAID configuration with 20 hard loses one hard drive. How many additional hard failures can the configuration tolerate before experiencing data loss?

A network administrator has to reconfigure the company firewall to allow access to a website on the internet.
Which technology will provide the administrator with the correct IP address?

What should an administrator review, prior to deploying an operating system (OS), to confirm thereare no incompatibilities with thedesired OS??

A PowerEdge 14G server administrator has to shut down a server for urgent intervention. They don't want to risk any data loss but don't know the OS password.
What steps should be taken?

Which RAID level requiresminimum of four hard drives?