Computer Network Basics Questions Medium
A network firewall is a security device or software that acts as a barrier between an internal network and external networks, such as the internet. It is designed to monitor and control incoming and outgoing network traffic based on predetermined security rules. The primary purpose of a firewall is to protect the network from unauthorized access, malicious activities, and potential threats by filtering and blocking potentially harmful data packets. Firewalls can be implemented at various levels, including hardware-based firewalls that are integrated into network routers or switches, or software-based firewalls that are installed on individual computers or servers. They play a crucial role in maintaining network security by enforcing security policies, preventing unauthorized access, and minimizing the risk of network attacks and data breaches.