Security is a major concern in all aspects of today's society. It is no less of a concern when it comes to computers.

In practice, computer security is divided into two areas:

  • Intrusion Detection and Prevention
  • Antivirus Protection

Both areas are interdependent: protecting against viruses can provide some protection against outside intrusions, and vice versa. Once established, security is not a permanent thing. As the various threats in the world proliferate and evolve, so do appropriate security measures. Fortunately, a knowledgeable computer professional can establish security so that it is largely self-tuning and self-repairing. This is good news for small companies as they will not constantly need an outside consultant to be updating their systems.

Intrusion Detection and Prevention is best established through careful and systematic configuration of computers and networks. It does get more complicated as the complexity of the network increases, and often computer or security professionals are needed to periodically check that a system is still secure. Although security products can be purchased separately, nearly everything that is required is included with commonly used hardware and software. It just needs to be properly configured and used.

Antivirus protection is established through the use of dedicated antivirus software. Again, as a network becomes more complicated, the antivirus solution also becomes more complicated, often with pieces of antivirus software on computers, servers, and other network equipment. Unlike intrusion detection and prevention, antivirus software needs to be purchased separately. Although there are several brands on the market, each with their own strengths and weaknesses, it is more important to have the software and keep it updated than is the exact brand of the antivirus software used.