The Internet

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Recommended: Internet and its service

Chapter One
The internet is made up of many segments,these internet connections is connected more than 2 billion end system. It means that the internet is a network of networks.They have to send internet to all 2 billion end systems and a month of internet can be as high as 40 exabyte.It means that a year of internet would be 12 * 40 = 480. That means 480 Exabyte a year and one thousand Exabyte = 1 ZB and in about every two year there will be around 1 ZB amount of memory. That is a lot of memories. The route is connecting all those end system or the so called "host". The internet is made up of protocol. They are very important to the internet and most of this book talks about it. Distributed applications, are really important as well,they are the email, VoIP , peer to peer, gaming network and all that stuff.If you want to distribute an application for computers you have to use the internet to send the data over.You will need to program it first to send the data you use some service from the internet. PROTOCOL is basically a connection between two systems. Like saying hi and the other says hi and you ask the time and they tell you the time. Like that we greet the person and computer greets a computer and asks the time and the other computer gives it. A protocol defines the format and the order of messages exchanged between Two or more communicating entities, as well as the actions taken on the transmission And/or receipt of a message or other event. The other thing is how can Google search transport data so quickly,it is because the amount of server it has.Google has around 30-50 data centers and with more than a thousand servers in each. 65% of developed countries have internet access at their home. The usual way that homes connec...

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...ation layer gives out connections to talk and send stuff over. The session layer is to have a recovery scheme and delimit and do other things. THE NETWORK UNDER ATTACK The networks can be under attack,bad guys can overflow your computer by stuffing giant useless files and make the host crash.The other types are worms which can spread easily by sneaking into an email and infecting several other ones easily.The other one is sniffers,they can sniff out all the keystrokes you do to get into a bank account and can get your money be copying a packet you are sending.The last one is masking someone who you trust upon like your family and use the trust to trick you. The history of internet In the 1960 the first internet connection was made,the packet switching device was made,years later,the packet circuit was upgraded and the amount of user also increased. End system = Host.

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