Data communication - Question and answer - 1

1. What are the components of Data communication ?
a. Message - It is the information to be communicated.
b. Sender - It is the device which sends the data messages.
c. Receiver - It is the device which receives the data messages.
d. Transmission Medium - It is the physical path by which a message travels from sender to receiver.
e. Protocol - It is a set of rules that governs the data communications.

2. What are the layers of TCP/IP model ?
The TCP/IP model describes a set of general design guidelines and implementations of specific networking protocols to enable computers to communicate over a network. TCP/IP provides end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination.

3. What is transmission medium ?
There are two types of transmission media, namely guided and unguided. Guided transmission media are cables like twisted pair cables, coaxial cables, and fiber optic cables. Unguided transmission media are wireless, such as infrared, radio waves, and microwaves.

4. What is Switching ?
Switching, as applied to networking and IT, is the practice of directing a signal or data element toward a particular hardware destination. Switching may be applied in various formats and can function in diverse ways within a greater network infrastructure.

5. What is meant by Data Communication ?
Communication is the process of sharing a message. A conversation between two people or device is an example of communication. Data communications refers to the sharing of a virtual message. Electronic communications, like emails and instant messages, whatsapp messages , as well as phone calls are examples of data communications.Data communications means the exchange of data between two devices via some form of transmission medium such as a wire cable,wifi,Bluetooth etc.

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