TABLE OF CONTENTS CHAPTER 1 What Is the Internet 5 CHAPTER 2 Wires Cables and Radio Waves 11 CHAPTER 3 It's All in the Protocols 17 HOW IT WORKS HTTP and HTML 22 CHAPTER 4 The Internet of Things 25 Focus on the Internet 30 Glossary 31 To Learn More 32 Index 32
CHAPTER 1 WHAT IS THE INTERNET Long Long ago if people wanted to communicate they wrote letters News took days or even months to get from place to place Today people can share photos or send e mail with just a tap on a screen They can also video chat with friends or stream movies The Internet makes all of this possible Many people use social networks to connect with friends on the Internet
