When securing a basic wireless network, WPA2 and WPA are appropriate authentication protocols. WPA2 (Wi-Fi Protected Access 2) is the most secure and recommended standard for wireless networks. WPA (Wi-Fi Protected Access) is an older version but still commonly used for basic network security. Protocols like RDP, SSL, and SNMP are used for different purposes and are not directly related to wireless network authentication. EAP is an authentication framework often used in more advanced network configurations rather than basic setups.