Description:Overview: At this day and age millions of people around the world are using the Internet but they don't know how it works! This book will give the reader a simple detailed idea about the infrastructure of the Internet and how it works. It covers the routers, the DNS servers, DHCP servers, IP addresses, MAC address, web servers, Ethernet networks or local Areas networks, WiFi networks and its types, WiFi hot spot areas, Wireless Mobile Internet and its devices like Dongles and MiFi devices, WiFi security and why it is important to be secured, how the Internet service is connected to your own home or office, and last not least how email works and what we mean by SMTP and POP3 servers! The book is written in simple language such that it can be read by both professionals and ordinary people. I hope that you find it useful.