Data communications (DC) is the process of using computing and communication technologies to transfer data from one place to another. In another way, we say that Data Communication is defined as the exchange of data between two devices via some form of transmission media such as a cable, wire cable,  internet wireless, LAN, WAN, or any media which can support to transfer of the data.

Data Communications is the transfer of data or information between a source and a receiver. The source transmits the data and the receiver receives it.

Data communication is said to be local if communicating devices are in the same building or a similarly restricted geographical area. The meanings of source and receiver are very simple. The device that transmits the data is known as the source and the device that receives the transmitted data is known as the receiver.  The data communication system may collect data from remote locations through data transmission circuits, and then outputs processed results to remote locations.

In this course, we teach some important basics of Data Communication and Computer Network (DCN), including various advanced concepts related to Data Communication and Computer Network.

Learn Data Communication & Computer Network, Why?

• Understanding  the Basic concept of Network
• Internet Uses in Data communication and its processing in LAN TCP/IP with uses WWW, FTP, email services, audio and video streaming, etc
• Networking engineering involves software, firmware, chip level engineering, hardware, and electric pulses that means the whole networking concept is divided into multiple layers.

Where we can use the Applications of Communication & Computer Network in Technology

• IP phones
• Exchange of information using e-Mails and FTP or another medium via the internet.
• Information sharing by using Web or Internet
• Date transfer using dynamic web pages with users
• Video conferences like Google Meet, Skype, etc
• Different Messaging services 

Before you start this, I'm making an assumption that you are already aware of basic computer concepts like input, output, what is keyboard, mouse, monitor, primary memory and secondary memory, etc.