What is programmed into a network-level firewall to decide which access requests to allow or block?

What is programmed into a network-level firewall to decide which access requests to allow or block?

• A. Privileges list
• B. Filtering rules
• C. Password rules
• D. Access control list

Answer: (B)

A firewall decides which traffic to allow or block based on a set of filtering rules. These rules specify the criteria for permitting or denying access, such as source and destination IP addresses, ports, protocols, and even connection state. The firewall evaluates each access request against these rules in order and takes the action specified when a match is found. This rule-based approach is what lets the firewall enforce security policies. Other options miss the core idea: a privileges list pertains to user permissions after authentication, and password rules relate to identifying users rather than controlling network traffic. An access control list is a specific implementation of filtering rules used by many devices, but the general mechanism the firewall uses to decide traffic flow is the filtering rules that describe allowed and blocked access.

A firewall decides which traffic to allow or block based on a set of filtering rules. These rules specify the criteria for permitting or denying access, such as source and destination IP addresses, ports, protocols, and even connection state. The firewall evaluates each access request against these rules in order and takes the action specified when a match is found. This rule-based approach is what lets the firewall enforce security policies.

Other options miss the core idea: a privileges list pertains to user permissions after authentication, and password rules relate to identifying users rather than controlling network traffic. An access control list is a specific implementation of filtering rules used by many devices, but the general mechanism the firewall uses to decide traffic flow is the filtering rules that describe allowed and blocked access.