Firewalls
A firewall is a network security device that monitors and filters incoming and outgoing community traffic in accordance with previously installed protection policies by an organisation. A firewall is essentially the barrier that stands between a private internal network and the open Internet. Firewalls provide defence against external cyberattackers by shielding your computer or network from unwanted or harmful network traffic. Additionally, firewalls can stop harmful malware from connecting to a computer or network over the internet. Firewalls are used in both private and professional settings, and many devices, including Mac, Windows, and Linux PCs, come with one built-in. They are often regarded as a crucial aspect of network safety.