Final answer:
Ethernet is the standard interface for all wired networks. Network administration involves tasks such as adding or removing users from a network.
Step-by-step explanation:
The standard interface for all wired networks is Ethernet. Ethernet is a set of procedures and protocols that define how data is transmitted over a wired network. It is widely used in local area networks (LANs) and provides a standardized way for devices to communicate with each other.
The addition or removal of users from a wired network by an administrator is an example of network administration. Network administration involves managing and maintaining a network, including tasks such as user management, network configuration, and troubleshooting.