Through which of following many local area networks (LAN) are connected toger and in general, whole country or world is included in it?

The correct answer is option (3)

Wide area network (WAN)

Concept:-

A wide-area network (WAN) is essentially a collection of interconnected local-area networks (LANs) or other networks.

Key Points

• The Internet is the biggest WAN in the world, and a WAN is essentially a network of networks.
• WANs are inherently expandable and have a big capacity, connecting many computers over a wide area.
• They make it easier to share local resources. To connect LANs and MANs to the Internet, WAN offers uplinks.

Additional Information LAN:- A local area network, or LAN for short, is a type of network that connects a few buildings together or individual residences or offices.

MAN:- A metropolitan area network (MAN) is a type of computer network that links computers in an area with many buildings, such as a single large metropolis, several smaller cities, or any other sizeable area.

VPN:- The term "Virtual Private Network," or VPN, refers to the possibility of creating a secure network connection when utilizing public networks.