What is a requirement when configuring an access point to allow wireless clients to connect?

When configuring an access point for wireless clients, it is essential that the clients know the SSID (Service Set Identifier) and the passphrase for connection. The SSID serves as the network's name, allowing devices to identify and connect to the correct wireless network amid numerous available networks. The passphrase is a security measure that ensures only authorized users can access the network, preventing unauthorized access to the wireless environment.

Having the SSID and passphrase allows clients to securely authenticate and establish a connection to the access point without exposing the network to potential security threats from devices that do not have proper credentials. This authentication process is crucial for maintaining the integrity and confidentiality of the wireless network.

In contrast, other options may involve practices and conditions that are not universally required. For example, device registration, VPN requirement, or firmware updates may be relevant in certain setups or for enhanced security but are not fundamental requirements for basic wireless connectivity through an access point.