Apple Certified Support Professional (ACSP) Practice Exam

A VPN, or Virtual Private Network, is primarily used to create an encrypted tunnel that securely connects a device to a network. This encapsulation ensures that data transmitted over public networks, such as the internet, is protected from interception and unauthorized access. By encrypting the data, VPNs provide confidentiality and integrity, making them a fundamental tool for secure communication, especially when connecting to remote servers or accessing sensitive information from public Wi-Fi networks.

While other options might seem relevant, they do not encapsulate the primary function of a VPN as effectively. For instance, speed enhancement is not a primary feature of VPNs; in fact, they can sometimes reduce speed due to encryption overhead. Guest access can be managed through other network configurations, such as guest networks, rather than a VPN. Blocking malicious websites typically involves different tools and services, such as firewall rules or web filtering solutions, rather than the core functionality of a VPN.