Every network device starts communicating with other network device after making sure the other device is on and is working fully. But, how a network device can make sure other device is responsive? Network devices check other devices by sending Hello packets. Other devices after receiving Hello packets send Acknowledgement packets. Network devices usually transmit Hello packets after every few seconds. Continue reading
IP Addressing
Subnetting
Single IP is purchased by the company and this single IP is responsible for networking of all the departments in a company. Being interested in networking, this is the first question that comes in the minds, How a single IP can be used by all the departments? The answer to this lies in the concept of subnetting. So, the question arises, what is subnetting? Converting single IP into more networks is called subnetting. Continue reading
IP Addressing
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
Zainub Wahid 