SSL <span>stands for Secure Sockets Layer and TLS stands for </span>its<span> successor Transport Layer </span>Security. They are protocols responsible for encryption and authentication and are application-layer protocols. SSL/TLS provides security all the way between the sender and the receiver, which means also between the sender and his or her e-mail server . Correct answer: c. both a and b.
If you have important data on your hard drive that is not backed up and your Windows installation is so corrupted you know that you must refresh the entire installation you should make every attempt to recover the data.