In the world of technology, networks play a vital role in exchanging information between computers. But what are the differences between a LAN, WAN, and subnet? Let’s break it down.
At its most basic, a network is just a group of computers connected to each other. This can be done through either a cable or a wireless connection. The most common way for computers to connect is through a switch, which is a central wiring point with multiple ports so that two or more computers can connect to each other. This creates a LAN or local area network, which is a private network found in a building.
However, if computers within a LAN need to access another network, such as the internet, they would need to contact an internet service provider (ISP) who would provide a gateway. A gateway is a modem and router combo that connects the LAN to a wide area network (WAN), which is a large network of computers that spans over a large geographical area, such as a country, continent, or even the entire globe.
In businesses, different departments may require separate networks for security and manageability purposes. This is where subnetworks or subnets come in. A subnet is a division of a larger network that allows for the separation of network traffic. Subnets are created through the use of routers, which act as the gateway between the different subnets.
Subnets can improve network performance by controlling broadcast traffic, which is when a computer sends out a message to every computer on the network. By breaking down a network into smaller subnets, broadcast traffic is limited to computers on the same subnet.
In summary, LANs are private networks found in buildings, while WANs are larger networks that span over a larger geographical area. Subnets are divisions of larger networks that allow for the separation of network traffic and improved network performance. Understanding these differences can help you better understand how networks work and how they are set up.