Definition
WPA2, or Wi-Fi Protected Access II, is a security protocol designed to secure wireless computer networks. It uses the Advanced Encryption Standard (AES) to encrypt data transmitted over Wi-Fi, providing a robust defense against unauthorized access and eavesdropping. WPA2 operates by requiring a pre-shared key or enterprise authentication to join a network, ensuring only legitimate users can connect. Implementing WPA2 is crucial for protecting sensitive information transmitted wirelessly, such as financial data or personal communications. For instance, a coffee shop using WPA2 prevents casual passersby from accessing its internal network and potentially intercepting customer traffic. Unlike its predecessor WPA, WPA2 mandates the use of AES encryption, offering significantly stronger security. This standard is a foundational concept tested on certifications like CompTIA Security+ and CISSP.