A SOHO wireless router needs to be configured so incoming traffic is only allowed on specified ports. Which of the following is the best way for the technician to accomplish this task?

Physically securing the router prevents unauthorized physical access but does not control incoming network traffic ports.

Implementing AES encryption is for securing wireless data transmission, not for controlling which incoming ports are allowed on the router's firewall.

Installing the latest firmware is a general security best practice that can fix vulnerabilities, but it doesn't specifically control incoming port allowances as directly as disabling UPnP or configuring firewall rules.

Disabling Universal Plug and Play (UPnP) is the best way to control incoming traffic on a SOHO router. UPnP allows devices on the local network to automatically open ports on the router, which can create security vulnerabilities by bypassing firewall rules, making the network less secure.