WLAN or Wireless Local Area Network describes a local radio network with a standard of the IEEE 802.11. The narrower meaning is synonymous with Wi-Fi. Unlike the wireless personal area network (WPAN), WLAN have greater power levels and ranges and WLAN generally offer higher data transfer rates. WLAN belongs to layer 1 and 2 of the OSI reference model, whereas WPAN provides emulation of the serial … [Read more...]
Provisioning in Cloud Computing
Provisioning in Cloud Computing is the process of on demand self service on pay as you go model to get new services or scale existing services as per need. As per definition of National Institute of Standards and Technology (in updated version of pdf), Provisioning in Cloud Computing is one of the feature of Cloud Computing itself. What is this Provisioning in Cloud Computing basically is … [Read more...]
RAID or Redundant Array of Independent Disks
RAID is the acronym for Redundant Array of Independent Disks used to organize multiple physical hard drives in computer to function as a logical drive. RAID allows a higher data availability in case of failure of individual hard drives. RAID is an practical implementation of Storage Virtualization. Unlike the usual target used in computer applications to avoid redundancy, for RAID systems, … [Read more...]
UMTS or Universal Mobile Telecommunications System
UMTS or Universal Mobile Telecommunications System is a 3G standard with significant higher data transfer rates than the wireless standard of second generation. Previously we wrote about the functions, features and types of USB Modems and we mentioned that some of these devices support Universal Mobile Telecommunications System (UMTS). UMTS supports significantly higher data transfer rates, up to … [Read more...]
Real Time Operating System (RTOS) : A Brief Article
Real Time Operating System or RTOS is an operating system with additional real time functions for adherence to time constraints and predictability of process. The main ingredient of such a specialized Real Time Operating System (RTOS) is real-time operating system kernel or in short real-time kernel. We wrote about Kernel in a separate article. Requirements to be Real Time Operating System … [Read more...]
Java Virtual Machine : Overview and Principle
Java virtual machine English is a fictional computer device simulated by specific software for each platform that executes programs compiled into Java bytecode. The device is simulated by a specific software for each platform (machines or OS) which enables applications of Java to produce the same results regardless of the platform as it is provided with the Java virtual machine … [Read more...]
ReactOS : Windows Application Compatible Open Source OS
ReactOS is a free operating system that is compatible with Microsoft Windows applications with the goal to complete binary compatibility for Microsoft Windows. ReactOS aims the kernel of Windows NT to be compatible with, making it possible for programs and drivers designed for Windows NT and its successors such as Windows XP, Windows Server 2003 and Windows 7 can run. Basics … [Read more...]
Blocking People in Facebook : Facts and Flaws
Blocking People in Facebook is abused by many users as the blocked user never knows that another user has blocked but that user can actually see your posts. It is among Facebook's Policy, clearly written "Blocking someone is completely confidential, and the person will not be notified that he or she has been blocked." and officially it is written "Blocking a user will prevent any type of direct … [Read more...]
Kernel Based Virtual Machine (KVM)
Kernel based Virtual Machine (KVM) is a Linux kernel infrastructure for virtualization and runs on x86 hardware with the hardware virtualization techniques from Intel (VT) or AMD (AMD-V) like Virtualization Capable Processors and on the System z architecture. Overview of Kernel Based Virtual Machine (KVM) Components of Kernel Based Virtual Machine (KVM) are kernel modules which … [Read more...]
APS or Active Pixel Sensor in Digital Photography
APS or Active Pixel Sensor is a semiconductor detector for measuring light manufactured with CMOS technology and therefore often referred to as CMOS sensor. Using the CMOS technology, it becomes possible to integrate other functions in the APS sensor chip, such as the exposure control, contrast correction or the analog-digital conversion. In the article, Image sensor of Digital Camera, we … [Read more...]
Abstraction : What is this Abstraction is ?
Abstraction is a frequently used terminology especially in articles of Virtualization, abstraction is to isolate an element of context or accompanying elements. The terminology Abstraction refers to the emphasis on "what do you do?" rather than the "how do you perform ? " in programming language. The word Abstraction has various application in various fields of Computer Science. Abstraction is a … [Read more...]