Jacqueline

Firewalls are a type of network security device that help protect your computer from unauthorized access. Firewalls are usually installed on the computer’s perimeter, or exterior, to protect it from attacks from the outside.

They can also protect the computer from unauthorized access from the inside, such as by hackers who have gained access to the computer through another vulnerability.

The firewalls job is to identify and block all unauthorized traffic from entering the computer. They do this by using a variety of methods, including the use of filters, rules, and signatures. To identify unauthorized traffic, the firewall will typically use a combination of the following:

The user’s IP address

The type of traffic being sent (e.g.

HTTP, FTP, etc.).

The time of day

The geographical location of the computer

The firewall can also use other methods, such as packet analysis, to identify the source of an attack. Once the firewall has identified the attack, it can then use the appropriate security measures to protect the computer.

Firewalls can be used on a single computer, or they can be used on a network of computers. They are typically installed on the computer’s perimeter, or exterior, to protect it from attacks from the outside.

The firewalls job is to protect the computer by helping to identify and block all unauthorized traffic.