Data Communication and Networking

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Data Communication and Networking

Data Communication and Networking

The Data communication and Networking refers to the transmission of such digital data between two or more computers. A computer network or data network is a telecommunications network that allows computers to exchange data. The physical connection between networked computing devices is established by wired or wireless means. The most famous computer network is the Internet.

This tutorial will teach you the basics of data communication and computer networking (DCN), and will also lead you to understand various advanced concepts related to data communication and computer networking.

Why study data communication and computer networks?

Basic Understanding of the Network

The interconnection system of computers and computerized peripheral devices (such as printers) is called a computer network. This interconnection between computers facilitates the exchange of information between them. Computers can be connected through wired or wireless means.

 Network engineering

Network engineering is a complex task that involves software, firmware, chip-level engineering, hardware, and electrical pulses. To simplify network engineering, the entire network concept is divided into several levels. Each layer involves a specific task and is independent of all other layers. But in general, almost all network tasks depend on all these layers. These layers share data and rely on each other only to receive input and send output.


A network of networks is called an internetwork, or the Internet for short. It is the largest network on the planet. The Internet has greatly connected all wide area networks and can be connected to local area networks and home networks. The Internet uses the TCP/IP protocol suite and uses IP as the addressing protocol. Today, the Internet is widely implemented using IPv4. Due to the shortage of address space, you are gradually migrating from IPv4 to IPv6. The

The Internet allows its users to share and access vast amounts of information around the world. Use WWW, FTP, email services, audio, and video streaming, etc. The Internet runs on a large scale on the Client Server model. The

Internet uses a very high-speed fiber optic backbone. To interconnect several continents, optical fibers are placed on the seafloor, which we call submarine communication cables.

 Computer network and communication applications

Computer systems and peripheral devices are connected to form a network. They provide many benefits:

  • Sharing resources, such as printers and storage devices
  • Sharing information via email and FTP
  • Sharing information via the Web or the Internet
  • Interacting with other users via dynamic web pages
  • IP phones
  • Video conferencing
  • Parallel computing
  • Instant messaging

Content Covered

1.1 Introduction to data communication
1.2 Characteristics of a data communication system
1.3 Data & Signal
1.3.1 Analog & Digital data
1.3.2 Analog & Digital Signal
1.3.3 Periodic & Non-Periodic Signal
1.3.4 Composite Signal
1.4 Signal Encoding
1.5 Synchronization
1.6 Digital Data to Digital Signal
1.6.1 Coding methods
1.6.2 Line Encoding
1.6.3 Block Coding

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