The Simple Definition
A router is a device that connects multiple networks together and directs the flow of data between them. It’s like the traffic cop on the internet, directing the flow of information to ensure it reaches its intended destination.
At its core, a router is a computer with specialized software and hardware that performs the task of routing. It uses routing tables and protocols to determine the most efficient path for data to travel from one network to another. When a packet of data (like an email or a web page) is sent from one device to another, the router examines the destination address and decides which path to send it on.
Where are Routers in a typical Network?
Routers are commonly found in homes and businesses, connecting devices like computers, smartphones, and tablets to the internet. They also play a vital role in larger networks, such as those used by corporations, government agencies, and internet service providers. These routers use advanced routing protocols and technologies to ensure that data is transmitted quickly and efficiently.
Routers and Internet Connectivity
Routers connect multiple networks together and direct the flow of data between them. It uses routing tables and protocols, such as the Border Gateway Protocol (BGP), to determine the most efficient path for data to travel from one network to another. BGP, a routing protocol that is used to route traffic on the Internet, allows routers in different autonomous systems (AS) to share routing information and makes the internet work as one big network by connecting other networks together
Routers also have a feature called Network Address Translation (NAT), which allows multiple devices to share a single IP address when connecting to the internet. This is particularly useful for households or small businesses that have multiple devices but only one internet connection.
What is next?
We will continue using this series to identify and describe multiple Network devices. How they fit in a typical network.
Other topics, part of this series
- The Basics of Networking | Network Elements | Switches
- The Basics of Networking | Network Elements | Firewalls and NGWF
- The Basics of Networking | Network Elements | Access Points
- The Basics of Networking | Network Elements | Wireless LAN Controllers
- The Basics of Networking | Network Elements | Endpoints, Servers and Computers
About the Author:
Andres Sarmiento, CCIE # 53520
With over 18 years of professional experience, Andres is a specialist in Unified Communications and Collaboration technologies, Enterprise Networks, and Network Security. He has consulted for numerous companies in South Florida, including Financial Institutions, on behalf of Cisco Systems. Andres has played a key role in several high-profile implementations, utilizing Cisco technologies such as Data Center, UC & Collaboration, Contact Center Express, Routing & Switching, Security, and Hosted IPT Service Provider infrastructures.