A company is implementing a web content filtering solution to prevent employees from accessing undesirable websites during work hours. What is the BEST approach that the company should employ to ensure maximum effectiveness of the filtering solution?
Depending on employees to self-categorize and avoid undesired content
Distributing client-side browser extensions to categorize and block content
Implementing a centralized proxy for content categorization and filtering
Using a localized hosts file on each computer to block specific website IPs