When configuring a router for a small business, the first setting a technician should configure is DHCP (Dynamic Host Configuration Protocol). DHCP is responsible for automatically assigning IP addresses to devices on the network, which is essential for enabling communication within the network. Without DHCP, devices would not receive the necessary IP configurations to communicate effectively.
A . DHCP: Configuring DHCP first ensures that all devices on the network receive their IP addresses automatically.
Why the other options are incorrect:
B . UPnP: UPnP (Universal Plug and Play) is used for simplifying device connectivity, but it is not a critical setting to configure first.
C . MAC filtering: MAC filtering is a security feature that limits which devices can connect to the network based on their MAC addresses, but it should be set up after basic network configuration.
D . VPN: VPN (Virtual Private Network) settings are for secure remote access, and should be configured after the essential network settings like DHCP are in place.
This topic falls under the Networking domain of the CompTIA A+ Core 1 exam.