A network technician has set up an FTP server for the company to distribute software updates for their
products. Each vendor is provided with a unique username and password for security. Several vendors have
discovered a virus in one of the security updates. The company tested all files before uploading them but
retested the file and found the virus. Which of the following could the technician do for vendors to validate the
proper security patch?

A.
Use TFTP for tested and secure downloads

B.
Require biometric authentication for patch updates

C.
Provide an MD5 hash for each file

D.
Implement a RADIUS authentication