WHAT IS INTERNET

Billion of connected computing devices : - hosts = end systems - running network apps at inernet's edge

• PACKET SWITCHES forward packets(chunck of data)

• we can forward packets using routers and switches form one node to another node.

• Communication links it is build between diffrent switches and involves

  • fiber
  • copper
  • radio
  • satellite tansmission rate is termed as bandwidth

  NETWORKS

  • collection of devices ,routers ,links : managed by an organisation.

  Internet netwrok of networks