Question

each device with a nic contains a unique identifier, known as a(n) ___ address, which distinguishes it from any other network - connected device in the world. mac vpn gateway ethernet

Explanation:

A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications on the physical network segment. It is used to distinguish one device from another on a network. A VPN (Virtual Private Network) is a service that provides a secure connection over the internet. A gateway is a node (router) in a computer network that serves as an access point to another network. Ethernet is a family of wired computer networking technologies.

Answer:

A. MAC