ARTIKEL BAHASA INGGRIS TENTANG Definition, Benefit and Explanation of Skype

 Definition, Benefit  and Explanation of Skype

Skype is a communications program with P2P technology (peer to peer). This program is a free program (a free download) and is made with the purpose of providing a means of voice communication (voice) High quality inexpensive Internet-based for all people in different parts of the world. Skype users can speak to other Skype users for free, with the cost of a traditional phone call (SkypeOut), receive calls from traditional phones (SkypeIn), and receive voicemail. Skype technology invented by entrepreneurs Niklas Zennström and Janus Friis, the same people who invented Kazaa and Joost (P2P for television). Skype then compete with open VoIP protocols such as SIP existing, IAX, and H.323. Skype group formed in September 2003 the company was bought by internet auction giant E-Bay in America in September 2005 and is headquartered in Luxembourg, Germany with offices in London, England, Prague, Russia and San Jose, California, USA Since its launch Skype has experienced rapid growth in both the popular and the use of its software development, services offered also be diverse ranging from the use of free or paid. In just a few short years in April 2006 Skype has 100 million users
1. Global and local communications are more economical via voice or video conferencing. As illustrated in 2007 called the comparison to the U.S. from Indonesia is Rp.6, 640, - / min while using skype, the activity obtained free of charge (to fellow Skype users) and paid when skype call to aircraft used for mobile phones: Rp. 1.593 / min or landlines plane: Rp. 423 / min. Communication become cheaper and affordable. Conference could take place between users (two people) up to five users at once.
2. Easy to use. For users who have been accustomed to using sender-receiver internet instant messaging, Skype software will be felt easily. Users are only required to have a computer with certain technical specifications, headset (which has a mike and speakers), as well as internet connection.
3. Better sound quality VoIP predecessor. Basic usability phone calls through any computer where the user is located (with internet connection) for free.
better sound In terms of better sound quality, it is possible that Skype team has managed to control those resources available on the network. Thus increasing the success and quality of calls on Skype network exceeds the level of POTS (Plain Old Telephony System: Regular Old Telephone System) without the use of an expensive resource concentration. By simplifying the software, the system enables the easy application by anyone
C. Traversal
Firewall and NAT (Network Address Translation) Clients who do not use a firewall and clients who have been on public IP addresses that can be targeted to help "end-links" from NAT to communicate with a direct call. This allows two clients who initially could not communicate to talk to each other, because the signal is translated to a call at the user end and other end users, so that concerns security or privacy risks can be overcome. Along with this, the only proxy-proxy that has a "quota" of excess are selected so that the performance of the users are not bothered. Several new techniques have been developed to avoid the firewall and gateway configuration on the end user, which is not sensitive configuration settings normally inhibits the majority of users to communicate. In short, the majority of Skype works behind firewalls and gateways without using any special configuration.

D. Data and Decentralized
Global User Search Tool Most of the sender-receiver instant messaging (Instant Messenger) or communications software requires a centralized search data form that aims to make the relationship between the end user successfully performed, in which the end user has a static user name because its IP address is likely to change. This change occurs when the user relocates or reconnects to the network using a dynamic IP address. Most of the internet based communication tools, search and find users using a central information (central directory) where any user name and corresponding IP numbers listed and find out whether users are in the network (online) or not. This information is very central costly when users add up to millions, with a decentralized infrastructure that's consuming a lot of resources, skype successfully focused its resources to develop the function. P2P networking technology that is used by the application "file sharing" (file-sharing) is actually almost perfect for use on a decentralized network used by skype, but these networks have naturally divided. Search can not connect the whole "end" contained in the network. So as to be able to communicate with the phone good quality with the lowest possible cost, a third generation of P2P technology ("3G P2P") or also known as the Global Index (Global Index) GI - it is proving yet another paradigm shift in the term " possible network ". IG technology is layered network in which the link-super (supernones) communicate with each other in a certain way so that each link in the network has full knowledge of all existing users and the resources used in the sheath (pauses calls) to a minimum. traffic that smart (intelligent routing) By using all available resources, Skype is able to direct the encoded smart dialing calls via all possible paths traversed effective. Skype even sure various connection paths open and dynamically choose the path that best move at the time. This makes Skype directly into people's attention because of its impact in reducing the connection gap and improving the quality of calls in the network.

F.  Security   
Each calls and instant messages encoded by Skype at one end and the other to protect user privacy. This encoding is necessary because all calls / distributed information exchange using the Internet facilities to the public.
G. Easy
With a device that is easy to use and not complicate users, Skype is made as simple as possible - all the people who can use Windows applications and software phone because it can work well with a pocket computer operating system (Pocket PC), Windows 2000, Windows XP, Windows Vista , Pocket PC, Mac OS X and Linux.

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