NETWORKING:-

NETWORKING:- A Computer network is a network of computers that are geographically distributed, but connected in a manner to enable meaningful transmission and exchange of data among them.

Basic Elements of a communication System.

• Sender : - Creates and sends the message.
• Medium: - Carries a message
• Receiver: - Receive a message

Networks Topologies.

• Topology of a network refers to the way in which the network's nodes(computer or other devices that need to communicate) are linked together.
• It determines the various data paths available between any pair of nodes in the network.
• Choice of a topology for a computer network depends on a combination of factors, such as:
  
  • Desired Performance of the system
  • Reliability Of the system.
  • Size(Numbers of nodes and their geographical distribution) of the system).
  • Cost of components and services required to implement network
  • Availability of communication lines

Star Topology

Advantages Of Star topology

• Star topology has minimal line cost because only "n-1" lines are required for connecting "n" nodes.
• Transmission delays between two nodes do not increase by adding new nodes to network, because any two nodes are connected via two links only.
• If any node other than the host node fails, remaining nodes are unaffected