GIAC Foundational Cybersecurity Technologies Practice Test

The primary function of a VPN is to establish a secure connection over the internet. A Virtual Private Network (VPN) creates a protected network connection when using public networks, ensuring that the data sent and received is encrypted and secure from potential eavesdroppers. This secure connection is particularly vital when accessing sensitive information or when using unsecured Wi-Fi networks, as it helps protect against various forms of cyber threats.

While options such as encrypting internet browsing history or protecting against viruses and malware might seem related, they do not capture the fundamental and primary role of a VPN. The encryption and privacy measures that a VPN provides effectively safeguard the user's data transmission, ensuring confidentiality and integrity. Additionally, improving network speed is not a guaranteed function of VPNs; in many cases, they can actually slow down the connection due to the overhead of encrypting and routing the data. Thus, the correct answer reflects the essential purpose of a VPN in cybersecurity practices.