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