The Internet Book

3

The Internet Works Well

•The Internet is a marvel of technical accomplishment.

•TCP/IP:– Accommodates growth and

change not imagined

4

IP Provides Flexibility

• IP provides the flexibility to accommodate underlying hardware.–Allows multiple vendors to

produce:•computers •routers that can communicate

5

TCP Provides Reliability

•TCP provides reliability.–Handles communication

problems–Communicates in applications–Handles rapid changes in

performance–Adaptes to congestion

automatically

6

TCP/IP Software Was Engineered For Efficiency

•TCP/IP sends only the minimum network packets.

•Runs well on all computers. TCP/IP

7

TCP/IP Research Emphasized Practical Results

•Scientists built, tested, and measured working communication systems.

•All new ideas were based on experimental evidence.

8

Rough Consensus and Working Code

•TCP/IP arose from a consensus among researchers.–Accepted ideas only after

implementation and demonstration–Allowed designers to correct

problems early

9

Formula For Success

• The Internet was extremely successful.– Due to:

•Talented, dedicated research team•Experimentation without economic gain•Built to operate efficiently•Each part worked well in practice before

adopted as a standard

10

Conclusion

• What are the lessons learned from the successful development of the Internet?

11

12

Glossary

• IP– Specification for the format of packets

computers use when they communicate across the Internet

• TCP– The name of protocols that specify

how computer communicate on the Internet