Monday, April 29, 2013

Network

A network is a group of two or more computer systems linked together. There are many types of computer networks, including:
  • local-area networks (LANs) : The computers are geographically close together (that is, in the same building).
  • wide-area networks (WANs) : The computers are farther apart and are connected by telephone lines or radio waves.
  • campus-area networks (CANs): The computers are within a limited geographic area, such as a campus or military base.
  • metropolitan-area networks MANs): A data network designed for a town or city.
  • home-area networks (HANs): A network contained within a user's home that connects a person's digital devices.
  • In addition to these types, the following characteristics are also used to categorize different types of networks:
  • topology : The geometric arrangement of a computer system. Common topologies include a bus, star, and ring. See the Network topology diagrams in the Quick Reference section of Webopedia.
  • protocol : The protocol defines a common set of rules and signals that computers on the network use to communicate. One of the most popular protocols for LANs is called Ethernet. Another popular LAN protocol for PCs is the IBM token-ring network .
  • architecture : Networks can be broadly classified as using either apeer-to-peer or client/server architecture.
  • Computers on a network are sometimes called nodes. Computers anddevices that allocate resources for a network are called servers.
    To connect two or more computers together with the ability to communicate with each other.


    5G Network


    What is 5G Network
    5G network is assumed as the perfection level of wireless communication in mobile technology. Cable network is now become the memory of past. Mobiles are not only a communication tool but also serve many other purposes. All the previous wireless technologies are entertaining the ease of telephone and data sharing but 5G is bringing a new touch and making the life real mobile life. The new 5G network is expected to improve the services and applications offered by it.

    5G network is very fast and reliable. The concept of handheld devices is going to be revolutionized with the advent of 5G. Now all the services and applications are going to be accessed by single IP as telephony, gaming and many other multimedia applications. As it is not a new thing or gadget in market and there are millions of thousands users all over the world who have experienced the wireless services and till now they are addicted to this wireless technology. It is not easy for them to shrink from using this new 5G network technology. There is only need to make it accessible so that a common man can easily afford the economic packs offered by the companies so that 5G network could hold the authentic place. There is need to win the customer trust to build fair long term relation to make a reliable position in the telecommunication field.

    To compete with the preceding wireless technologies in the market 5G network has to offer something reliable something more innovative. All the features like telephony, camera, mp3 player, are coming in new mobile phone models. 4G is providing all these utility in mobile phone. By seeing the features of 4G one can gets a rough idea about what could be a 5g Network offer. There is messenger, photo gallery, and multimedia applications that are also going to be the part of 5G. There would be no difference between a PC and a mobile phone rather both would act vice versa.

    5G Network Features

    A first remarkable feature of 5G network is the broadband internet in mobile phones that would be possible to provide internet facility in the computer by just connecting the mobile.      
    Handheld Computer:    
    Now computers and mobiles are not separate things. A smallest mobile is equal to a handheld computer. The way it facilitates the user with games, cameras, video n music recorder / player is really remarkable.

    Data sharing in 5G network is very easy. It omits the condition of putting both mobile face to face so that data could be shared. But 5G Bluetooth technology removes this condition and data could be transferred if it is shared in the range of 50m. 
    It is not far away when we see the global mobiles all over the world. A user can move everywhere in the world by holding just 5G mobile network. All the roaming would be exempt from the tariff plans. The rates of the call would not be different area to area.


    4G Technology


    What is 4G technology

    When talking about 4G, question comes to our mind is what is 4G Technology4G is short forFourth (4th) Generation Technology4G Technology is basically the extension in the 3G technology with more bandwidth and services offers in the 3G. But at this time nobody exactly knows the true 4G definition. Some people say that 4G technology is the future technologies that are mostly in their maturity period. The expectation for the 4G technology is basically the high quality audio/video streaming over end to end Internet Protocol. If the Internet Protocol (IP) multimedia sub-system movement achieves what it going to do, nothing of this possibly will matter. WiMAX or mobile structural design will become progressively more translucent, and therefore the acceptance of several architectures by a particular network operator ever more common.

    Many Technologies appear in many different flavours and have many diverse tags attached to them, but that does not really indicate that they are moving in dissimilar tracks. The technologies that fall in the 4G categories are UMTS, OFDM, SDR, TD-SCDMA, MIMO and WiMAX to the some extent.

    4G Technology offers high data rates that will generate new trends for the market and prospects for established as well as for new telecommunication businesses. 4G networks, when tied together with mobile phones with in-built higher resolution digital cameras and also High Definition capabilities will facilitate video blogs.

    After successful implementation, 4G technology is likely to enable ubiquitous computing, that will simultaneously connects to numerous high date speed networks offers faultless handoffs all over the geographical regions. Many network operators possibly utilize technologies for example; wireless mesh networks and cognitive radio network to guarantee secure connection & competently allocates equally network traffic and bandwidth.

    Some of the companies trying 4G mobile communication at 100 Mbps for mobile users and up to 1 Gbps over fixed stations. They planned on publicly launching their first commercial wireless network around 2010. As far as other competitor’s mobile communication companies working on 4G technology even more quickly. Sprint Nextel was planned to launch WiMAX over 4G broadband mobile network in United States. Some of the other developed countries like United Kingdom stated a plan to sale via auction of 4G mobile frequencies couple of years back. The word “MAGIC” also refers to 4G technology which stands for Mobile multimedia, Any-where, Global mobility solutions over, Integrated wireless and Customized services.

    With 4G mobile technology around the corner it is difficult to imagine how we were able to go around our everyday lives without mobile communication speeds of up to 100Mbps. Not only will 4G improve mobile communication, it will likely positively impact wireless technology for online gaming and internet browsing in the home. If you want to test the capability of 4G technology in the online gaming industry visit spinpalace.co.uk and download their latest software for the ultimate gaming experience. Visit them on your 4G compatible mobile device and experience the 4G technology.


    What is 3G Technology


    3G Technology

    If you want augmented bandwidth, multiple mobile applications and clarity of digital signals, then3G (Thrid Generation Technology) is your gateway. GSM technology was able to transfer circuit switched data over the network. The use of 3G technology is also able to transmit packet switch data efficiently at better and increased bandwidth. 3G mobile technologies proffers more advanced services to mobile users. It can help many multimedia services to function. The spectral efficiency of 3G technology is better than 2G technologies. Spectral efficiency is the measurement of rate of information transfer over any communication sytem. 3G is also known as IMT-2000.

    3G technology and 3g Technologies characteristics

    3G technologies make use of TDMA and CDMA. 3G (Thrid Generation Technology) technologies make use of value added services like mobile television, GPS (global positioning system) and video conferencing. The basic feature of 3G Technology (Thrid Generation Technology) is fast data transfer rates. However this feature is not currently working properly because, ITU 200 is still making decision to fix the data rates. It is expected that 2mbit/sec for stationary users, while 348kbits when moving or traveling. ITU sell various frequency rates in order to make use of broadband technologies. Network authentication has won the trust of users, because the user can rely on its network as a reliable source of transferring data.3G technology is much flexible, because it is able to support the 5 major radio technologies. These radio technologies operate under CDMA, TDMA and FDMA.CDMA holds for IMT-DS (direct spread), IMT-MC (multi carrier). TDMA accounts for IMT-TC (time code), IMT-SC (single carrier). FDMA has only one radio interface known as IMT-FC or frequency code. Third generation technology is really affordable due to the agreement of industry. This agreement took pace in order to increase its adoption by the users. 3G (Thrid Generation Technology) system is compatible to work with the 2G technologies.3G (Thrid Generation Technology) technologies holds the vision that they should be expandable on demand. The aim of the 3G (Thrid Generation Technology) is to allow for more coverage and growth with minimum investment.

    3G technologies (Third Generation Technologies) 

    There are many 3G technologies as W-CDMA, GSM EDGE, UMTS, DECT, WiMax and CDMA 2000.Enhanced data rates for GSM evolution or EDGE is termed to as a backward digital technology, because it can operate with older devices. EDGE allows for faster data transfer than existing GSM.EDGE was introduced by AT& T in 2003.EDGE has increased the GSM coverage up to three times more. EDGE is a 3G Technology (Thrid Generation Technology); therefore it can be used for packet switched systems. Universal mobile telecommunications systems .UMTS conforms to ITU IMT 2000 standard. It is complex network and allows for covering radio access, core network and USIM (subscriber identity module). It is a relatively expensive technology for the network operators because it requires new and separate infrastructure for its coverage. The GSM is the base of this technology. CDMA is also referred to as IMT-MC. this technology is close to 2G technology GSM because it is also backward compatible. Digital enhanced cordless telecommunications (DECT) is another 3G Technology (Thrid Generation Technology). DETC was developed by European telecommunications standards institute; however it is now widely popular in the other countries of the world as well. It runs over a frequency of 1900Mhz. WiMax is a 3G Technology (Thrid Generation Technology) and it is referred to as worldwide interoperability for microwave access. It is a wireless technology. It transmits variety of wireless signals. It can be operated on the multi point and point modes. it is portable technology. This technology is based on the wireless internet access. Name of the WiMax was developed in 2001 by WiMax forum. This technology removes the need for wires and is capable enough to provide 10mbits/sec. it can connect you to hotspot.


    Infosys partners with IPsoft to automate IT services


    BANGALORE: In a move that signals a significant step towards automation in the IT services outsourcing business, Infosys has struck a partnership with IPsoft, the New York-based company founded by Indian American Chetan Dube that provides tools that free engineers from mundane, repetitive tasks.

    The most fascinating and influential aspect of IPsoft's technology is that it includes the element of machine learning -- or artificial intelligence as some call it -- so that companies don't have to employ an army of people to write the complicated scripts that traditional automation tools require. The system learns from doing, thus making the process of automation itself automated.

    These elements have helped build 220 customers for IPsoft worldwide, including Cisco, Canon, Pepsico, British Telecom, Gap, ING, Autodesk, and Pfizer.

    Infosys will use the technology to automate parts of its infrastructure management and network management services - the areas that IPsoft's platform is particularly strong in. It will also work with IPsoft to adapt the technology to application maintenance and business process outsourcing services, and over time, look at adapting it to automate even parts of its application development business.

    "What robotics did for the auto assembly line, we are now doing for the IT engineering line," said Chandrashekar Kakal, global head of Infosys's business IT services, the segment that constituted 63% of the company's $7.4 billion revenues last year. He said customers to whom the technology had been demonstrated were excited. Kakal will establish a centre of excellence at Infosys's Mysore campus to do R&D, establish proofs of concepts and train engineers on IPsoft's platform. Initially, some 200 employees will be trained and that number could go up to 4,000 before long.

    Speaking to TOI on the phone from New York, Chetan Dube too referred to the automotive example and said, "History repeats itself." He said the IT industry was on the precipice of a transformation unlike any before. He said complexities in networks and applications had grown so much that traditional systems were unable to handle them. "Chief information officers are under increasing pressure from business units to ensure availability of IT resources, and ensure consistency of business outcomes, without any variance. Human processes have variance built into their DNA. Our automated systems ensure absolute consistency, and are self-healing and self-governing," he said.

    Dube grew up in Delhi, did an electrical engineering degree from IIT-Delhi in 1989, and then moved to the US. He was an assistant professor in mathematics at New York University before he founded IPsoft in 1998. Dube called Infosys an "ideal partner" because they shared the same vision. He said IPsoft was in talks with some of the other leading Indian IT companies for similar partnerships but declined to name them. However, indications are that the others include Wipro and Cognizant.

    Automation possibilities are very high -- upto 80-90% -- in what are called Level 0 and Level 1 tasks, things like password resets, database failures. If a database goes down because it's full, the manual process would involve a human being expanding the capacity or purging some data to create space. IPsoft's platform will automatically do these tasks; it will also figure out why the failure happened, and prevent future failures by, say, automatically purging data that it understands to be least relevant.

    Higher level tasks can also be automated, but to lesser degrees. Dube said his platform reduced the average time to resolution of problems by 60%. For Infosys, such automation fits well into its new vision to grow revenues without adding employees to the same degree. This is necessary for it to sustain its high margin strategy, something it regards critical for long-term sustainability. For the industry, revenues have been till now directly correlated with the number of people employed, and Infosys, which already has over 1.56 lakh employees, feels it would be difficult to keep expanding this number for much longer, without running into an HR and talent management nightmare.

    But that's not the only reason why IT outsourcing companies may need partnerships with the likes of IPsoft. Offshoring of IT to countries like India began because Indian engineers were substantially cheaper than engineers in developed markets. Now, the automated systems are proving to be cheaper than Indian engineers. Writing about automation companies like IPsoft and Blue Prism, a British startup, The Economist magazine in January reported (quoting a study by research firm HfS - Horses for Sources) that Blue Prism's robots cost at most $15,000 a year, compared to an offshore IT worker who costs $30,000 and an onshore one who costs $80,000.

    The magazine then quotes HfS to say, "One telecoms company replaced 45 offshore employees, costing a total of $1.35m a year, with ten of Blue Prism's software robots, costing $100,000. The telecoms firm then spent its savings of $1.25m on hiring 12 new people to do more innovative work locally at its headquarters."

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