When a spammer forges the sender's address and enters an invalid receiver, which of the following settings will cause the receiving mail server to create backscatter?

Which of the following spam filtering techniques has the highest potential for generating false positives?

Which of the following techniques requires posting an email address where only spammers would find it?

What is CryptoLocker?

Antivirus programs hash files on a computer in order to detect which of the following activities?

In order to help prevent spam, a honeypot performs which of the following functions?

Daniel has deployed an antispam solution in his network. If a spam SMTP is accepted, it is called:

Which is categories of spam mails?

Which is the way through which virus spread?

Which is disadvantages of the Symmetric Key Cryptography?

What is the maximum key length of AES?