Your customer is very concerned about security for Wi-Fi at his home. He wants to make sure that only computers, he has authorized, can get on his Wi-Fi. What is the most appropriate security measure

A firewall protects a network from external threats and controls traffic flow, but it doesn't inherently manage which specific client devices are authorized to connect to the Wi-Fi itself.

WPA (Wi-Fi Protected Access) encryption secures the wireless communication by encrypting data and requiring a password, but it doesn't restrict access to specific authorized devices once the password is known.

MAC Filtering is a security measure that restricts network access based on the MAC address of a device. By configuring the wireless access point to only allow MAC addresses of authorized computers, the customer can effectively prevent unauthorized devices from connecting to their Wi-Fi network, fulfilling the requirement for selective access.

WEP (Wired Equivalent Privacy) is an outdated and insecure encryption protocol that is easily cracked and provides weak protection, making it an inappropriate security measure.