CompTIA Network+ Practice Test

Which technology can be implemented to ensure authentication on wireless networks?

1. WPA2 encryption

2. 802.1X Network Access Control

3. MAC address filtering

4. Network segmentation

The correct answer is: 802.1X Network Access Control

The best choice for ensuring authentication on wireless networks is the implementation of 802.1X Network Access Control. This technology facilitates port-based network access control, meaning it requires authentication for devices attempting to connect to the network. It works by allowing clients to connect to the wireless network only after they have successfully authenticated through a centralized server using protocols such as EAP (Extensible Authentication Protocol). This process enhances security by ensuring that only authenticated users and devices gain access to the network, making it much more secure than solutions that do not require verification of user credentials or device identity. While WPA2 encryption is also important for protecting the data being transmitted over the wireless network, it primarily focuses on securing the communication itself rather than providing a robust authentication mechanism. MAC address filtering serves as a basic security measure by allowing or blocking devices based on their MAC addresses, but it can be easily bypassed and does not guarantee reliable authentication. Network segmentation, while useful for managing traffic and containing security breaches, does not provide authentication solutions for wireless connections. Therefore, 802.1X is the most effective technology for authenticating users on wireless networks.