Which of the following is a firewall function?

Answer: Packet Filtering

Explanation:

A firewall is a device or software that protects computers and networks from external threats. A firewall can inspect and block incoming packets, depending on their content. In addition, a firewall can provide security for online resources by protecting them from attacks.

Packet filtering is a common firewall function. Packet filtering works by examining each packet and determining whether it should be allowed to pass through the firewall. If the packet is determined to be dangerous, such as an attack payload or a virus, it will be blocked. This helps protect your computer against unwanted intrusions and keeps your network safe.