You are working as a senior network technician at Certkiller .com. A trainee asks you what the
physical address of a network interface card (NIC) is called. What will you answer him?

A.
SSID.

B.
DHCP address.

C.
IP address.

D.
MAC address.

Explanation:
In computer networking a Media Access Control address (MAC address) or Ethernet Hardware
Address (EHA) or hardware address or adapter address is a quasi-unique identifier attached to
most network adapters (NICs). It is a number that acts like a name for a particular network
adapter, so, for example, the network cards (or built-in network adapters) in two different
computers will have different names, or MAC addresses, as would an Ethernet adapter and a
wireless adapter in the same computer, and as would multiple network cards in a router. However,
it is possible to change the MAC address on most of today’s hardware.