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Tech Tutorials

Common Networking Terms

Before you start proceeding with the tutorial on computer network, it is important to understand the terms that you will see throughout this guide regarding networking.

Common networking terms:


Each device on a network, is called a node. A node may be a computer, laptop or printer or any input and output device.


A network host is a computer or other device connected to a computer network. A network host may offer information resources, services, and applications to users or other nodes on the network.

Network Interface Card(NIC):

A network interface card is a computer circuit board or card that is installed in a computer that connects to the network.

Network operating system (NOS):

It is an operating system that coordinates the activities of multiple computers across a network. It is designed to runs on a server and enables the server to manage data, users, groups, security, applications, and other networking functions.

LAN (Local Area Network):

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a home, school, computer laboratory, or office building, using network media.

WAN (Wide Area Network):

A wide area network (WAN) is a network that covers a broad area (i.e., any telecommunications network that links across metropolitan, regional, national or international boundaries) using leased telecommunication lines.


A protocol is a set of rules and standards that basically define a language that devices can use to communicate.

IP (Internet Protocol):

The Internet Protocol is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.

TCP (Transmission Control Protocol)

Transmission control protocol (TCP) is a network communication protocol designed to send data packets over the Internet. TCP is a transport layer protocol in the OSI layer.

FTP (File Transfer Protocol):

The File Transfer Protocol (FTP) is a standard network protocol used to transfer computer files from one host to another host over a TCP-based network, such as the Internet.

DNS (Domain Name System):

The Domain Name System (DNS) is a distributed naming system for computers, services, or any resource connected to the Internet or a private network. The DNS translates Internet domain and host names to IP addresses. DNS automatically converts the names we type in our Web browser address bar to the IP addresses of Web servers hosting those sites.