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IT Networking

IT Networking Basics

Networking, also known as Computer networking or IT networking, is the practice of transporting and exchanging data between nodes over a shared medium in an information system. An IT network does not just comprise the design, construct and use, but also the management, maintenance and operation of the network infrastructure, software and policies. With the rapid growth of Internet and global communication IT network has become part of everyone’s life.

Computer networking enables devices and endpoints to be connected to each other on a local area network (LAN) OR to a larger network, such as the internet or a private wide area network (WAN). This is an essential function for service providers, businesses and consumers worldwide to share resources, use or offer services, and communicate. Networking facilitates everything from telephone calls to text messaging to streaming video to the internet of things (IoT), that is the next buzzword in technology.

The level of skill required to operate a network directly correlates to the complexity of a given network. For example, a large enterprise may have thousands of nodes/computing devices and rigorous security requirements, such as end-to-end encryption, requiring specialized network administrators to oversee the network.

At the other end of the spectrum, a layperson may set up and perform basic troubleshooting for a home Wi-Fi network with a short instruction manual. Both examples constitute computer networking.

Types of networking

There are two primary types of computer networking: wired networking and wireless networking.

Wired networking requires the use of a physical medium for transport between nodes. Copper-based Ethernet cabling, popular due to its low cost and durability, is commonly used for digital communications in businesses and homes. Alternatively, optical fibre is used to transport data over greater distances and at faster speeds, but it has several trade-offs, including higher costs and more fragile components.

Wireless networking uses radio waves to transport data over the air, enabling devices to be connected to a network without any cabling. Wireless LANs are the most well-known and widely deployed form of wireless networking. Alternatives include microwave, satellite, cellular and Bluetooth, among others.

Generally speaking, wired networking offers greater speed, reliability and security compared to wireless networks; wireless networking tends to provide more flexibility, mobility and scalability.

It should be noted that these types of networking concern the physical layer of the network. Networking can also be classified according to how it’s built and designed, encompassing approaches that include software-defined networking (SDN) or overlay networks. Networking can also be categorized by environment and scale, such as LAN, campus, WAN, data centre networks or storage area networks.

Components of networking

Computer networking requires the use of physical network infrastructure that includes

  • Hubs
  • Switches
  • Bridges
  • Routers
  • Gateways
  • Network interface cards (NICs)
  • ISDN adapters
  • Wireless access points (WAPs)
  • Also, the underlying firmware that operates such equipment
  • Other components include the software necessary to monitor, manage and secure the network
  • Additionally, networks rely on the use of standard protocols to uniformly perform discrete functions or communicate different types of data, regardless of the underlying hardware.

    Networking Protocols

    Protocols are very essential to communicate between various network devices and there are standard protocols such as TCP/IP, IPX/SPX by Novell and NetBEUI etc. Of which TCP/IP has become the most popular and standard protocol as of now, also an open standard and widely accepted. The internet protocol suite, also known as TCP/IP, is a family of protocols responsible for transporting data and services over an IP-based network.

    For example, voice over IP (VoIP) can transport IP telephony traffic to any endpoint that supports the protocol. HTTP provides a common way for browsers to display webpages, FTP for file transfers, POP/IMAP for receiving emails and SMTP for outgoing email transfers.

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