In general, a computer network is divided into five types, namely;
1. Local Area Network (LAN)
Local Area Network (LAN) is a privately owned network within a building or campus-sized to several kilometers. LANs are often used to connect personal computers and workstations in a corporate office or factories in order to use shared resources (eg printers) and exchange information.
2. Metropolitan Area Network (MAN)
Metropolitan Area Network (MAN) is basically a LAN version is larger and usually uses the same technology as the LAN. MAN can include corporate offices are adjacent or also a town and can be used for private purposes (private) or public. MAN capable of supporting both voice and data, can even be associated with cable television networks.
3. Wide Area Network (WAN)
Wide Area Network (WAN), the range covers a wide geographical area, often covering a country or even continent. WAN consists of a collection of machines that aim to run the programs (applications) user. Get more about this with COM Express™ basic
4. Internet
Actually there are many networks in this world; often using hardware and software are different. People who are connected to the network often expect to be able to communicate with others who are connected to other networks. Desires such as these require the relationship between networks that are often not compatible and different. Usually to do this required a machine called the gateway to engage and implement the necessary translation, both hardware and software. Collection of interconnected networks is called the Internet.
5. Wireless Networking
Wireless network is a solution to the communication can not be done with the wired network. For example, people who want to get information or communicate despite being on top of a car or airplane, it is absolutely necessary because the cable network without a wired connection may not be made in a car or plane. Currently the networks without wires has been rapidly adopted by making use of satellite services and are able to provide faster access speeds than a wired network.
Internet has grown rapidly and competitively in recent years. No one can predict that the Internet could become a very important technology in the 21st century at 25 years ago. Many people do not recognize the possibilities the Internet can connect people around the world, open the job to anyone and also the coolest entertainment. Speaking about the benefits of the Internet, we can not forget the ability of the Internet to sell and buy products. E-commerce and online shopping became an icon in Internet activities. Now people use the Internet not just to chat and data transfer, or maybe looking for articles and video. They started using the internet to shop online.
When we talk about online shopping, there are two search engines of the products on the internet, the Yahoo Store and Google Product Search. We can easily find relevant products we are looking for with this search engine. It must be difficult for us if we do not have search engines to help us to find websites or online stores on the internet to sell products that look. That’s why Google Product Search and Yahoo Store play the most important for online shoppers.
Yahoo and Google also have an online store so you can sell your products on the internet and you can get more facilities than other Internet users. It is no secret that Google is more popular than Yahoo in everything, so you can increase your income or your online sales with Yahoo products product store to Google Base. Of course not easy for you to apply Yahoo Store to Google, but there are some people or companies offering this service so that you can easily improve your buyer without hassles.
On 2 November 1988 a 22-year old Cornell University student called Robert Morris released an internet worm capable of exploiting vulnerabilities in the UNIX operating system. It is estimated that it infected 10 percent of the internet including computer spy. Twenty years on, the scale of the malware problem has grown astronomically. Today’s internet attacks are organized and designed to steal information and resources from consumers and corporations. Although there have been instances of attacks driven by politics and religion, the main motivation is fnancial. The web is now the primary route by which cybercriminals infect computers, mainly due to the fact that increasing numbers of organizations have secured their email gateways. As a consequence, cybercriminals are planting malicious code on innocent websites. This code then simply lies in wait and silently infects visiting computers.
The scale of this global criminal operation has reached such proportions that we discover one new infected webpage every 4.5 seconds – 24 hours a day, 365 days a year. Computer spy activities such as spyware, adware, malware are world wide threats. 2008 proved that malware is more than just a Microsoft problem. Although the sheer number of Windows threats far outweighs attacks against any other platform, cybercriminals are turning their attention to other operating systems such as Apple Macintosh, and vulnerable cross-platform software. This seems likely to continue in 2009, with the increasing popularity of portable devices such as the iPhone, iPod Touch, Google Android phone and ultra-mobile netbooks.
2008 computer spy activities
Biggest malware threats – SQL injection attacks against websites and the rise of scareware
New web infections – one new infected webpage discovered by Sophos every 4.5 seconds
Malicious email attachments – fve times more at the end of 2008 than at the beginning
Spam-related webpages – one new webpage discovered by Sophos every 15 seconds
New scareware websites – five identifed every day
Top malware-hosting country – US with 37 percent
Top spam-relaying continent – Asia with 36.6 percent
Amount of business email that is spam – 97 percent
It remains paramount that organizations defend themselves at all levels of their business, not just at the email and web gateways. Networks, desktops, laptops and mobile devices must be comprehensively secured to defend against the myriad threats posed by the criminal underground
Almost anything and everything in today’s world is unlimited. The world has come to a stage where technology and advancement has made it possible to procure almost everything in limitless quantities. So why not unlimited broadband too? Broadband is available today in both options; limited and unlimited. The influx of better infrastructure and better technology has now made broadband services possible in urban, semi-urban and rural areas also. From the time when only a dial-up connection was accessible in rural areas, companies have made headway into villages and areas where laying cables are impossible. Satellite Internet is the new phenomenon which can even provide competitive business broadband services in rural villages.
The minimum threshold for an Internet service to be termed as a broadband service is 768 Kbps of download speed. Most business broadband providers now have a minimum speed of 2 Mbps to a maximum of 24 Mbps. The higher the speed limit, the more expensive the broadband connection. A huge range of frequencies available has now made it viable for multiple users to log on to a single server and experience the same speed. Even during peak traffic hours like in the evenings or weekends, broadband services with reliable speeds are available for home as well as business purposes.
Small and medium businesses have long realized the need of a good business broadband connection. Whereas unlimited broadband is available for residential as well as business purposes, broadband services for businesses are expensive. But the huge number of competition in the market have steadily brought down prices and unlimited broadband for trade, commerce and industry is now available at unbeatable tariffs.
Broadband services can be obtained as monthly subscriptions. For a fixed fee which depends on the download speed and data transmission, you can access broadband Internet. When broadband is limited, you subscribe for services on a particular speed under a specific download limit crossing which you will have to pay for extra usages. For example, you may take a monthly subscription for Rs.899 which provides speeds upto 2 Mbps and has a download limit of 10 GB. If you cross the limit of 10 GB in a month, you will end up paying more than Rs.899 for extra usage.
Unlimited broadband is different because you don’t have a limit. You can download unlimited music, movies and wallpapers from the Internet all at a fixed rate. For example, you may have a monthly plan of Rs.1099 for a download speed of 2 Mbps. For Rs.1099 you can explore and download all you like.
When choosing a business broadband service, the most important things you have to keep in mind and compare are the subscription package, download speed, extra charges and after sales services. For a business situation you cannot compromise on any of these parameters.