INTRODUCTION
Computers have made great inroads in our everyday life and thinking. They are put to use for all sorts of applications ranging from complex calculations in the field or frontline research, engineering simulations down to teaching, printing books and recreational games. The ease with which computers can process data, store and retrieve it painlessly has made them inevitable in office and business environments. The areas of applications of computers are confined only by limitations on human creativity and imagination. In fact a computer can perform any task that can be carried out systematically. Therefore, it is essential for every educated person today to know about a computer, its strengths, its weaknesses and its internal structure.
Computer Maintenance and Repairs
Computers have become a necessity today and are no longer a luxury. They are not only a part of our professional life but are also an important part of our social life. There is hardly any day when people will not check their mail, or browse through the Internet. Thus we need the computer at every moment.
but at the same it is important to always remember that computer is only a machine. It requires regular maintenance and repair. It is said that a computer that is well maintained is unlikely to need any repair while the one that is badly maintained will need frequent repairs. Removing unwanted files from the system, optimizing the web browser, installing only the necessary programs, and keeping the computer safe, are some of the ways by which you can keep your computer well maintained.
computer technicians are capable to handle any form of computer repair, whether it is an emergency repair required by some major problem, or a routine computer maintenance repair. There are many computer repair and technical support service providers in the market today both big and small. These service providers will vary greatly in quality, cost and the level of expectation. It is always advisable, however to avail the quality services of company that offers a comprehensive computer technical support.
the technician can either visit your home or office for the repair work or you can get it done online. Online computer repair is very popular these days among the tech consumers. With online technical support the consumers get quality technical support at their own homes or offices. This is made possible with the help of remote desktop software, and remote technical support technicians.
a remote computer technician watches everything on his own computer screen while working on your problem thus helping you fix it. You can also ask for phone based technical support. In this method you are given instructions from a remote location over phone and you just have to follow those instructions to fix the error in your computer. However this can be frustrating depending on the complexity of the necessary repair. That's why remote support is preferred.
there are many companies offering complete computer technical support. You can find them all online. Browse the Internet and you will get the list of service providers along with their complete company details. Check and compare the range of services and charges offered by different service providers and select the one that best suits you.
A network consists of two or more computers that are linked in order to share resources (such as printers and CD-ROMs), exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams. The three basic types of networks include:
Local Area Network (LAN)
Wide Area Network (WAN)
A Local Area Network (LAN) is a network that is confined to a relatively small area. It is generally limited to a geographic area such as a writing lab, school, or building. Rarely are LAN computers more than a mile apart.
In a typical LAN configuration, one computer is designated as the file server. It stores all of the software that controls the network, as well as the software that can be shared by the computers attached to the network. Computers connected to the file server are called workstations. The workstations can be less powerful than the file server, and they may have additional software on their hard drives. On most LANs, cables are used to connect the network interface cards in each computer. See the Topology, Cabling, and Hardware sections of this tutorial for more information on the configuration of a LAN.
Wide Area Networks (WANs) connect larger geographic areas, such as
Advantages of Installing a School Network
Speed. Networks provide a very rapid method for sharing and transferring files. Without a network, files are shared by copying them to floppy disks, then carrying or sending the disks from one computer to another. This method of transferring files (referred to as sneaker-net) is very time-consuming.
Cost. Networkable versions of many popular software programs are available at considerable savings when compared to buying individually licensed copies. Besides monetary savings, sharing a program on a network allows for easier upgrading of the program. The changes have to be done only once, on the file server, instead of on all the individual workstations.
Security. Files and programs on a network can be designated as "copy inhibit," so that you do not have to worry about illegal copying of programs. Also, passwords can be established for specific directories to restrict access to authorized users.
Centralized Software Management. One of the greatest benefits of installing a network at a school is the fact that all of the software can be loaded on one computer (the file server). This eliminates that need to spend time and energy installing updates and tracking files on independent computers throughout the building.
Resource Sharing. Sharing resources is another area in which a network exceeds stand-alone computers. Most schools cannot afford enough laser printers, fax machines, modems, scanners, and CD-ROM players for each computer. However, if these or similar peripherals are added to a network, they can be shared by many users.
Electronic Mail. The presence of a network provides the hardware necessary to install an e-mail system. E-mail aids in personal and professional communication for all school personnel, and it facilitates the dissemination of general information to the entire school staff. Electronic mail on a LAN can enable students to communicate with teachers and peers at their own school. If the LAN is connected to the Internet, students can communicate with others throughout the world.
Flexible Access. School networks allow students to access their files from computers throughout the school. Students can begin an assignment in their classroom, save part of it on a public access area of the network, then go to the media center after school to finish their work. Students can also work cooperatively through the network.
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