Chapter 19 Why The Internet Works Well Introduction

Chapter 19 - Why The Internet Works Well • • Introduction The Internet Works Well Open System (non-proprietary) IP Provides Flexibility [uses "layered protocol" approach] – The Internet Protocol accommodates many types of hardware because it makes almost no assumptions about the underlying network hardware. – Because TCP/IP standards documents specify the exact way to send IP datagrams on a given type of network, computers and routers from multiple vendors always agree on the details.

Chapter 19 - Why The Internet Works Well • TCP Provides Reliability – Because it constantly monitors conditions on the Internet and automatically adapts, TCP makes reliable communication possible even when the Internet experiences temporary congestion. • TCP/IP Software Was Engineered For Efficiency • TCP/IP Research Emphasized Practical Results

Chapter 19 - Why The Internet Works Well • The Formula For Success – TCP/IP protocol software and the Internet were designed by talented, dedicated people. – The Internet was a dream that inspired and challenged the research team. – Researchers were allowed to experiment, even when there was no short-term economic payoff. Indeed, Internet research often used new, innovative technologies that were expensive compared to existing technologies. – Instead of dreaming about a system that solved all problems, researchers built the Internet to operate efficiently.

Chapter 19 - Why The Internet Works Well – Researchers insisted that each part of the Internet work well in practice before they adopted it as a standard. – Internet technology solves an important, practical problem, the problem occurs whenever an organization has multiple networks. • Terms – – – OSI Model TCP/IP standards documents rough consensus and working code – Open System