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Showing posts from June, 2013

National Knowledge Network

National Knowledge Network The NKN is a state-of-the-art multi-gigabit pan-India network for providing a unified high speed network backbone for all knowledge related institutions in the country. The purpose of such a knowledge network goes to the very core of the country's quest for building quality institutions with requisite research facilities and creating a pool of highly trained professionals. The NKN will enable scientists, researchers and students from different backgrounds and diverse geographies to work closely for advancing human development in critical and emerging areas. Features: NKN is designed as a Smart Ultra High Bandwidth network that seamlessly interconnects the leading Scientific and Technological institutions - which are pursuing world-class research and development. NKN design is inherently proactive; it takes into account the requirements that may occur in the near term and long term. Some of the salient features of the NKN are: ·  

What is Wi-Fi ???

What is Wi-Fi?                                                                                                                  Wi-Fi is the name of a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections. Wireless networks operate using radio frequency (RF) technology, a frequency within the electromagnetic spectrum associated with radio wave propagation. When an RF current is supplied to an antenna, an electromagnetic field is created that then is able to propagate through space. The cornerstone of a wireless network is a device known as an access point (AP). The primary job of an access point is to broadcast a wireless signal that computers can detect and "tune" into. The radios used for Wi-Fi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and

Shouldn't India have a Root Server ???

A Root name server is a name server for DNS root zone. Every new DNS query resolved by our local resolver first goes to Root Name Server and then root name server directs it to required domain server. This means that if in any case, root name servers goes down, then whole internet goes down (don't worry this cannot be done so easily as most of root name servers are running on Anycast and located all over the world). Recently, an anonymous group posted, to target these 13 root name severs and to bring them down by DDOS attack on 31st March 2011, to protest against SOPA and PIPA. But as expected, they didn't succeed. The last time someone seriously tried to take out the root servers was about 4 or 5 years ago and they managed to take down six out of thirteen servers. I am not saying that it could not be done but it would be tough. Every root name server is operated by different organization (except 'A' and 'J' which are operated by VeriSign) but they all po