The term “firewall” has one that most people know but few understand. It’s often confused with anti-virus software because of the similarities of purpose, but it has a completely different use on your computer. This infographic by ZoneAlarm breaks it down nicely for us (while throwing in a quick pitch about their product). Knowing what they do and why they’re important can help you understand how to better protect your computer from the more nefarious types on the internet. Click to enlarge. …