CompTIA Network+ Practice Test 2026 - Free Network+ Practice Questions and Exam Prep Guide

Using a VPN, or Virtual Private Network, is an effective method for securing private data while it is transmitted over a public network. A VPN establishes a secure, encrypted connection between the user's device and a remote server, acting as a tunnel that protects the data from potential eavesdroppers.

When data is sent over a public network, it is vulnerable to interception. A VPN mitigates this risk by encrypting the data, making it unreadable to anyone who might try to capture it on the network. This ensures that sensitive information, such as personal logs, financial data, or company communications, remains confidential and secure.

In contrast, other options like an ISP (Internet Service Provider) primarily manage the transmission of data over the internet but do not provide encryption or security features to safeguard user data. A LAN, or Local Area Network, is intended for use in localized settings, such as within a building or campus, and does not apply to securing data over public networks. A CDN, or Content Delivery Network, optimizes the delivery of web content but does not inherently provide security for private data in transit. Thus, a VPN is the most reliable choice for protecting such information while traversing public networks.