What Is The Meaning Of a Firewall?
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A firewall is a security system that acts as a barrier between a trusted internal network and an untrusted external network, such as the Internet. It is designed to prevent unauthorized access to the internal network while allowing legitimate traffic to pass through. Firewalls may be hardware- or software-based and are often part of a larger security system.
A firewall is a system that is designed to prevent unauthorized access to or from a private network. Firewalls can be hardware–based or software–based and can be implemented as a combination of both. Firewalls are commonly used to prevent unauthorized internet users from accessing private networks connected to the internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.