- Computer Networks
Wired and Wireless Networks
Network Tools and Applications
Introduction to Computer Networks
A collection of interconnected computers is called a Computer Network. Two computers or devices are said to be interconnected if they are capable of sharing and exchanging information with each other by following a protocol.
Advantages of Computer Networks
• Resource sharing
• Improved communication
• Reduced communication cost
• Reliability of data
• Central storage of data
Structure of a network
A network comprises of several components along with their functionalities that contribute to its smooth functioning. A computer network comprises of :
A device or a computer that sends the data.
A device or a computer that receives the data.
Message is the information to be communicated. It may be text, image, audio, or video.
A transmission medium is a physical path through which the data flows from sender to receiver. A cable or wire or Radiowaves can be the medium.
A set of rules that governs data transmission. It represents the communication methods which are to be followed by the sending and receiving devices.