When you send  a query to Google, it replies you back. Have you ever wondered and tried to figure out that how Google replies you? How Google knows that its only you who want reply? Why the reply by Google is not sent to all the devices connected in network? How Google figures it out which reply to be sent to which device only? OK, leave Google, Let’s suppose your are in your office and you want to communicate with only one PC, but how do router figures out that where to send the query? Why the router in your office don’t send reply to all the devices connected to that network? Aren’t you curious how communication is happening on Internet? The one word answers to all these questions and that one word is “IP Addressing”. Continue reading →