A critical portion of the systems security for your business is a firewall. If you have more than one computer or wireless devices hooked up to a network, then usually two types of firewall are employed. One form is a software firewall which should be activated on all computers and the other form is a hardware firewall that operates within your router. The complexity of firewall protection you require is based on the needs of your business.
In order to understand the purpose of a firewall, think of it as a fence around your computer or network that protects the perimeter and helps stop the invasion of hackers into your system. A hardware firewall would be like a large fence between the Internet and your complete network while a software firewall would be like a fence around each individual computer station. The firewalls use different protocol types to filter out malicious data from being allowed to enter while allowing safe data to come through. Depending on the protocol used by the firewalls in your business,