Computer Networking Basics

Study Notes

Computer Networking

When we think about computers, we usually imagine single machines sitting on a desk or in a room. However, the true power of computers comes when multiple machines are connected together into a network. Computer networking allows computers to communicate and share resources, enabling us to connect and interact with others around the world, fostering collaboration, commerce, and entertainment.

Types of Networks

Local Area Network (LAN)

A LAN is a computer network that primarily covers a relatively short distance, typically connecting devices in a defined physical space like an office building, school, or hospital. These networks are usually privately owned and managed. When you build a LAN, hardware components such as routers, switches, and cables are used. Software like operating systems and business applications further facilitate communication.

Wireless Local Area Network (WLAN)

In contrast to Wired Local Area Networks (WLANs operate wirelessly, allowing connections between devices on the network without the need for physical cords. WLANs are essentially wireless versions of LANs.

Wide Area Network (WAN)

As the name implies, a WAN connects computers over a wide area, such as across regions or continents. The internet is the largest example of a WAN, connecting billions of computers worldwide. WANs are typically managed through collective or distributed ownership models.

Metropolitan Area Network (MAN)

MANs are larger than LANs but smaller than WANs. Cities and government entities typically own and manage MANs.

Personal Area Network (PAN)

A PAN serves one person, connecting devices like your iPhone and Mac to share and sync content such as text messages, emails, photos, and more.

Protocols and Infrastructure

Every bit of information sent over the internet doesn't go to every device connected to the internet. It's the combination of protocols and infrastructure that directs information to its intended destination. Computer networks connect nodes like computers, routers, and switches using cables, fiber optics, or wireless signals. These connections allow devices in a network to communicate and share information and resources. Networks follow protocols, which define how communications are sent and received.

Conclusion

Computer networking is a critical component of our modern world. It enables communication for every business, entertainment, and research purpose. From the largest global networks like the internet to smaller, personal networks, each connection empowers us to interact and collaborate in ways that were unimaginable just a few decades ago. As technology continues to evolve, we can expect even more innovative applications and improvements in the realm of computer networking.

Description

Explore the fundamentals of computer networking, from different types of networks like LAN, WLAN, WAN, MAN, and PAN to understanding protocols and infrastructure. Learn how networks enable communication and resource sharing, connecting devices worldwide.