CREST Practitioner Security Analyst (CPSA) 2025 – 400 Free Practice Questions to Pass the Exam

The protocol that ensures only authorized parties can view transmitted wireless information is WPA, which stands for Wi-Fi Protected Access. WPA provides strong encryption and authentication mechanisms to secure wireless networks, significantly improving security over its predecessor, WEP (Wired Equivalent Privacy).

While WEP was one of the first security protocols developed for wireless networks, it is now considered inadequate due to several vulnerabilities that can be exploited by attackers to decrypt the data being transmitted. In contrast, WPA includes more robust encryption methods, such as TKIP (Temporal Key Integrity Protocol) and AES (Advanced Encryption Standard), which are designed to protect data confidentiality against unauthorized access.

VPN (Virtual Private Network) is not a wireless security protocol but rather a technology that creates a secure connection over the internet and can be used to encrypt traffic between devices. CDP (Cisco Discovery Protocol) is a network discovery protocol used by Cisco devices to share information about directly connected devices, and it is not relevant to wireless security.

Thus, WPA is the correct answer as it specifically addresses the need for secure encryption and authentication in wireless communication.