What does a firewall prevent?
A firewall examines each packet (piece of data) that goes in and out your computer. It prevents hackers who are looking to access your computer to obtain different types of personal information and files. It also stops other malicious traffic like worms – that could be responsible for slowing down or blocking your system – and Trojans, which may cause damage to your hard drive. Why would I need both antivirus and a firewall?Antivirus software will primarily protect your computer against viruses. A firewall will protect your computer against other types of Internet threats such as hackers, worms and Trojan horses, which cannot be fully detected by any antivirus software. Reversely, firewall software does not necessarily protect your computer against all types of viruses. As a result, it is advised to install both antivirus and firewall software to achieve maximum protection.
