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Showing posts from May, 2014

Download Top 7 Free Antivirus

Here is a list of  a comparative grading of World's Most Popular Free Antivirus Solutions . This list of results was published by PCMAG, after a series of tests in PCMAG's Labs. Here is a list of Top Most Popular and Competent Free Antivirus Software as shown and rated by Different Popular Online Software Collection Providers like, Softpedia, Snapfiles.com and Cnet.com along with PCMAG. So, Download Your Selected Antivirus from the Following List of  Top 7 Free Antivirus software of 2014 : 1. AVAST World’s most-trusted antivirus avast! now protects over 200 million PCs, Macs, and Androids globally – more than anyone else. Download avast!  free today! 2. AVG Get our essential award-winning free protection now AVG AntiVirus FREE Free Download 3. AVIRA   Avira Free Antivirus Effortless protection for virus-free devices  Download Avira Antivirus Free  4. BitDefender   Trust Bitdefender Security Technologies 500 million users already do Dow

Explain Advantages and Disadvantages of Fiber Optic Cable

What is a Fiber Optic Cable? A Fiber Optic cable comes with the technology that uses glass threads called fibers to transmit data as pulses of light. A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves. A Fiber Optic Cable transmits data as pulses of light through tiny tubes of glass. A Fiber Optic cable has a very narow strand of glass like human hair.  What is Bandwidth of a Fiber Cable?  Modern fiber cables can contain up to a thousand fibers in a single cable, with potential bandwidth in the terabytes per second.  Explain Advantages and Disadvantages of Fiber Optic Cable Advantages of fiber Optic Cables Fiber Optic cables are used to create very high speed networks. Fiber Optic cables come with a very high information carrying capacity. Electromagnetic waves cannot disturb the data passing through the Fiber Optic cables. Fiber Optic Cables provide a more reliable and secure data t

Explain Different Uses of Communication Technologies

Following are the main uses of Communication Technologies: 1. Video Conferencing Video Conferenccing combines the computer communication capabilities with video technologies to conduct an online meeting between two or more distant participants. The participants of a Video Conferencing are normally at different geographical locations within a building like a university campus or within a city at different branch offices of an organizaion in a city. If the communication technology is supported with high speed internet, the participants may in different cities or even in different countries of the world. Uses of Video Conferencing Online Meetings Online Job Interviews Technical Support Distance Learning Requirements for Video Conferencing It requires: A P-IV computer Microphone Speakers Video Cameras Communication Devices Communication Software High Speed Broad Band Internet  2.   Voice Mail Voice Mail works as an answering machine. The caller may l

Memory and Virtual Memory Management

What is Memory Management? One of the main functions of Operating systems is Memory Management. Memory Management may be defined as the process of managing the optimal use of main memory that is RAM (Random Access Memory). RAM is much faster than hard disk. So RAM is used to store data and instructions temporarily while they are being executed by CPU ( Central Processing Unit or PROCESSOR ). CPU can get data and instructions from RAM much faster that from hard disk. As we know CPU is a very very fast device. It may execute billions of instructions per second. CPU will have to wait for data and instruction from hard disk because getting data from hard disk is very slow. That is why RAM is used. So data and instructions needed for execution are brought into main memory that is RAM first. Now RAM provides data and instructions to CPU rapidly. What is Memory Management and virtual memory management Operating System allocates the required memory are in main memory to program