A network administrator noticed various chain messages have been received by the company.
Which of the following security controls would need to be implemented to mitigate this issue?

A.
Anti-spam

B.
Antivirus

C.
Host-based firewalls

D.
Anti-spyware

Explanation:
A spam filter is a software or hardware solution used to identify and block, filter, or remove unwanted messages sent via email or instant messaging (IM).
Incorrect Answers:
B: Antivirus software is used to protect systems against viruses, which are a form of malicious code designed to spread from one system to another.
C: A host-based firewall is installed on a client system and is used to protect the client system from the activities of the user as well as from communication from
the network or Internet. It does not block email messages or instant messaging (IM) messages.
D: Spyware monitors a user’s activity and uses network protocols to reports it to a third party without the user’s knowledge. This is usually accomplished using a
tracking cookie.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, Sixth Edition, Sybex, Indianapolis, 2014, pp 18-19, 161-162, 300
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 246