A server that has been in production for a year needs to be patched. Management enforces a strict policy to be followed on all production servers.
The policy stipulates the following for all change management:
- Changes must be reviewed and accepted by a change committee.
- Changes must be made on development/staging servers two weeks before
being made on production servers.
- Changes must have install and uninstall steps in case of issues.
Which of the following are the BEST reasons to have a change management plan in place?
(Choose two.)

A Linux administrator created a script that will run at startup. After successfully writing the script, the administrator received the following output when trying to execute the script:
hash: ./startUp.sh: Permission denied
Which of the following commands would BEST resolve the error message?

A technician needs to configure a server's RAID array for maximum capacity. Which of the following RAID levels BEST meets this requirement?

A systems administrator is setting up a new server that will be used as a DHCP server. The administrator installs the OS but is then unable to log on using Active Directory credentials. The administrator logs on using the local administrator account and verifies the server has the correct IP address, subnet mask, and default gateway. The administrator then gets on another server and can ping the new server. Which of the following is causing the issue?

Which of the following policies would be BEST to deter a brute-force login attack?