A company wants to ensure their employees do not access gambling sites during work hours from corporate devices. The network administrator is tasked to enforce this policy using security features available on their network firewall. Which of the following actions would effectively help in achieving this requirement?
Update the firmware of the network firewall to the latest version.
Configure URL filtering rules on the network firewall to block websites categorized as gambling.
Disallow the use of mobile devices on the company network.
Enforce network access control (NAC) to restrict all unauthorized devices from the network.