Which technology is designed to filter communications between a program and the Internet?

A software firewall is specifically designed to monitor and filter communications between a program and the Internet. It acts as a barrier between the trusted internal network and untrusted external sources, controlling incoming and outgoing traffic based on predetermined security rules. This function is crucial for protecting a system from unauthorized access and potential threats that can arise from internet connections.

By examining data packets and deciding whether to allow or block them, a software firewall can prevent harmful traffic from reaching applications and systems. This capability is fundamental in maintaining the security and integrity of the device while interacting with external networks. The software firewall also provides the flexibility to set rules tailored to the user's needs, thereby enhancing security tailored to specific applications or services being used.

In contrast, RADIUS servers primarily focus on providing centralized authentication, authorization, and accounting for users who connect to and use a network service. Antivirus software is designed to detect, prevent, and remove malware but does not specifically filter network communications. BitLocker To Go is a data encryption feature aimed at securing data on removable storage devices rather than network traffic monitoring.