A technician is configuring a SOHO router and wants to only allow specific computers on the network. Which of the following should the technician do?

MAC filtering allows the technician to create a whitelist (or blacklist) of Media Access Control (MAC) addresses, ensuring that only devices with MAC addresses explicitly permitted on the list can connect to the network. This directly achieves the goal of allowing only specific computers.

Disabling DHCP would require manual IP configuration for every device, which is cumbersome, but it does not prevent unauthorized devices from connecting if they manually configure an IP address.

Port forwarding directs incoming external traffic to specific internal devices and ports; it is used for external access to internal services, not for restricting internal device access to the network.

Disabling guest access prevents unauthorized users from connecting to a dedicated guest network, but it does not restrict access for specific computers on the main network itself.