What is a firewall?

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Multiple Choice

What is a firewall?

A firewall is a filter between networks that enforces access rules by allowing or blocking traffic. It can be software running on a computer or server, or a dedicated hardware device placed at the edge of a network. The firewall examines network traffic against configured rules and makes decisions about whether to permit or deny each packet or connection. It can control traffic in both directions (incoming and outgoing) and may track connection state to distinguish legitimate ongoing conversations from individual, unrelated packets. This helps protect systems from unauthorized access, malware, and other threats while still enabling legitimate communication. Other options describe different things: one option focuses on speeding up network performance, another on authenticating users, and the last on compressing files—none of these are firewall functions.

A firewall is a filter between networks that enforces access rules by allowing or blocking traffic. It can be software running on a computer or server, or a dedicated hardware device placed at the edge of a network. The firewall examines network traffic against configured rules and makes decisions about whether to permit or deny each packet or connection. It can control traffic in both directions (incoming and outgoing) and may track connection state to distinguish legitimate ongoing conversations from individual, unrelated packets. This helps protect systems from unauthorized access, malware, and other threats while still enabling legitimate communication.

Other options describe different things: one option focuses on speeding up network performance, another on authenticating users, and the last on compressing files—none of these are firewall functions.

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