Question

question 12
which statement is true about mac addresses?
the iso is responsible for mac addresses regulations.
a nic only needs a mac address if connected to a wan.
the first three bytes are used by the vendor assigned oui.
mac addresses are implemented by software.

Explanation:

The IEEE (not ISO) is responsible for MAC - address regulations. A NIC has a MAC address regardless of whether it's connected to a WAN or not. MAC addresses are hard - coded into network interface hardware, not implemented by software. The first three bytes (24 bits) of a 48 - bit MAC address are the Organizationally Unique Identifier (OUI) assigned by the IEEE to the vendor.

Answer:

C. The first three bytes are used by the vendor assigned OUI.