Firewalls (Part 2)
Many other filtering can be done to protect computers and even in a home scenario with only a few computers, firewall software would be a good investment but as stated, it comes standard or as add-on options with anti virus software you may already have. Bigger corporations install a firewall appliance which is simply a stripped down computer installed with firewall software that is connected onto the main line before it enters the organization. This way, any blocked sites is prevented from sending information into the organization say email that comes from a social networking site, it then notifies system admin of the occurrence for proper action. That way, any unsolicited information is blocked from there preventing it from congesting the local network possibly gathering information about a lot of things.