Which term describes a private network that uses TCP/IP and is restricted to members of an organization?

• A. Intranet
• B. Internet
• C. Extranet
• D. LAN

Answer: (A)

The main idea here is distinguishing private, organization-only networks that run on standard Internet protocols from broader public networks. An intranet is a private network built on TCP/IP that’s restricted to members of an organization, so employees can securely access internal sites, files, and applications. This makes it ideal for internal communications and collaboration while remaining isolated from the public Internet.

Why the others don’t fit as well: the Internet is the global public network, not restricted to a single organization. An extranet extends part of an organization’s intranet to external partners or customers, so it isn’t limited to internal members. A LAN is a local-area network, which can be private, but it’s defined more by its geographic scope (a building or campus) rather than by being a private, organization-wide network using standard Internet protocols.