Abstract- The Internet is a very strong and powerful weapon that has evolved over the years since its origin in the early 1960s. The Internet has gone from being used only for military purposes to becoming a part of everyday life. The Internet is the largest and most powerful computer network. Internet usage has grown rapidly over the past decade. There are billions of Internet users around the world and the numbers are continually growing by the second. Keywords: communication, computer network, decoding, ARPANET, packet switching, security, I. Introduction Communication has become much more convenient due to the invention of the Internet. The Internet has now become an integral part of the daily lives of people in general. The advantages of the Internet1. Online Shopping The Internet makes it easier than ever for people to view and purchase items from the comfort of their own home, with just the push of a button. You can purchase a wide variety of items, from books to clothes to cars, on the Internet. The Internet has made it easier to advertise your brand to a wide variety of consumers through popular websites and even social media. With the convenience of accessing information from around the world, stores can now easily keep up with the latest trends and styles to meet consumers' wants and needs. Websites like eBay, Amazon, Wal-Mart, and Best Buy have thrived in the online shopping business. 2. Social Media Websites like Facebook, Twitter, YouTube and other social media sites have emerged due to the Internet and have made a great impact across the world. Now they are sites and apps that have made it easier for people to communicate faster and also view other people's information, pictures and interests. Above all, Facebook had the highest number of users. Monthly active users at the end of 2015 amounted to approximately 1.6 billion of the entire population. And that's just the number of active users in the last 30 days of the statistic. Other mobile social apps are Vine and Snapchat which many young people now use. There are also dating sites where people post photos of themselves and potentially meet