What is a router

You may search for the functional definition of a network router and wonder why you need a router if you have a modem. A modem is a hardware component that allows another devices, such as a router and/or switch to connect to the Internet. It converts or modulates an signal from a telephone or cable wire to data (series of 1s and 0s) that a computer can recognize. Many DSL (Digital Subscriber Line) typically has an integrated router where cable modems commonly require an external router.

Routers are necessary integral part of your computer network weather you have only one or more computers and network devices (such as network printers, network attached storage, network scanners, camera security, and other devices). It facilitates, establishes, and manages connections between the local network and the internet to pass information with internal devices as computers, servers, laptops, tablets, and gaming devices in the form of packets. A network packet is the fundamental unit of information transmitted over a network or over a digital communication link. Packets usually contain a header with control information about the packet type, source address, and destination address.


Many routers offer integrated Wi-Fi access point. This is a good solution for homes and small offices. Larger offices and large homes would have wireless router and external access points. This would be another article in the future. The main effort  is to keep it simple and easy to maintain.