[attachment=9062]
Internet
The Internet is a network of networks interconnected by means of the Internet Protocol Suite.
It is an architecture for a system of computer-based applications.
Protocols are standard procedures, conventions and formats for inter-computer communication.
The Internet protocols are based on packet switching concepts.
Circuit and Packet Switching
Packet Switching Features
Multiplexing data from multiple processes
“Store-and-forward”
Automatic speed adaptation
Adaptive alternate routing
Packet Structure
Internet Addressing
IPv4 - 32 bits (4.3 billion addresses)
IPv 6 – 128 bits (1038 addresses)
that’s 100 trillion trillion trillion …
Internet Packet Formats
Packet Networks
Packet switched
Some use virtual circuits
Peer-to-peer
Client/server
Some are shared media (e.g., Ethernet)
Internetworking
Routers
Encapsulation
End-to-end packets
Internet Protocol- IP