User account
A collection of information that tells Windows which user rights and access permissions a person has on a computer. The user account records the user name, password, and a unique number that identifies that account.
Workgroup
A group of computers that are connected on a network and share resources, such as printers and files. When you set up a network, Windows automatically creates a workgroup and gives it a name.
Network
A group of computers or other devices, such as printers and scanners, that communicate either wirelessly or by using a physical connection, such as an Ethernet cable or a phone line.
Domain
A collection of computers on a network that share a common database and security policy. A domain is administered as a unit with common rules and procedures, and each domain has a unique name.