What interfaces are devices such as computers and printers connected to?

• A. Network Interfaces
• B. IP addresses
• C. VLAN IDs
• D. MAC addresses

Answer: (A)

The idea being tested is that devices connect to a network through network interfaces. A network interface is the actual channel that lets a device send and receive data on a network, such as an Ethernet port or a wireless adapter in a computer or printer. The other items—IP addresses, MAC addresses, and VLAN IDs—are related to that connection but aren’t the connection itself. An IP address is the logical address assigned to the interface to enable routing, a MAC address is the hardware identifier of the interface, and a VLAN ID is used to tag and segregate traffic on the network. So devices like computers and printers connect to the network via their network interfaces.