Some of us may be unfamiliar with the many tech terms that spruce up every so often. Firewall can also be a term that not many are familiar with. 

According to a study by National Cyber Security Alliance, only 4 percent of Americans say they understand firewalls “completely”, while more than 44 percent don’t understand firewalls at all - or know if they have one enabled on their PC. So for those who feel unsure, keep reading to find out why a firewall is a necessary part of your online defense.