Final answer:
The posting of SSIDs and passwords for private wireless networks is an example of War chalking. This practice has evolved from physical markings to online sharing and is distinct from more technical attacks like WEP or WPA cracking and the Evil twin approach.
Step-by-step explanation:
An employee has discovered a website that publishes the SSIDs and passwords for private wireless networks, including the information for your company's network.
This scenario is most likely an example of b) War chalking. War chalking refers to the practice of physically marking the locations of unsecured wireless networks, but it has evolved to also include the online sharing of this type of information. It's not as technical as WEP cracking or WPA cracking, which involve actual hacking into a network, and it's different from an Evil twin attack, where a malicious Wi-Fi network mimics a legitimate one to deceive users.