traffic filtering

Traffic filtering is a security process used by networks to control which data can enter or leave. It examines incoming and outgoing information based on predefined rules, such as source or destination addresses, protocols, or keywords. If the data matches the criteria for allowed traffic, it passes through; if not, it is blocked. This helps protect networks from malicious or unwanted activity, ensuring only legitimate communication occurs. Think of it like a security checkpoint that screens and sorts information to maintain safe and efficient network operation.