As we have already noted, security software refers to programs designed to help secure a computer system or computer network. Types of security software include: anti-virus software, anti-spyware software and firewalls.
Anti-virus software is used to prevent, detect and remove malware such as: computer viruses, adware, backdoors, keyloggers, rootkits, spyware, trojan horses and worms.
A firewall is used to prevent intruders from gaining access to a network. It can be either hardware- or software-based, but in this course we will be concerned primarily with software-based firewalls.the main function of a firewall is to maintain control of incoming and outgoing network traffic by analysing data packets and deciding whether or not they should be allowed through.
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