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Dear students, welcome to my blog of computer engineering..

Dharamvir Saini

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Functions of CPU, Memory and Input /Output Devices

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         CENTRAL PROCESSING UNIT (FUNCTIONAL PARTS AND FUNCTIONS) The central processing unit comes in action when the input has been recorded through input unit. The central processing unit is responsible for actual processing of inputs to generate the output. The central processing unit (CPU) is considered as the brain of the computer. It is also called as Microprocessor. This device converts all the supplied input into output as per the instructions supplied by the user. The CPU of a computer is the device on which the speed and efficiency of the computer mainly depends on. Fig. 1.3 : Central Processing Unit The CPU is divided into arithmetical & logical unit (ALU) and Control Unit (CU). The ALU performs arithmetical and logical calculations and CU supervises the working of ALU. Computer cabinet is not CPU. CPU is fitted inside it. (a)   Control Unit: The control unit acts as sup...
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Fundamentals of computer

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Introduction : The implementation of computers is one of the most noticeable changes in the past few decades. A computer is now a very familiar device and each one of us can recognize the use of computers in various fields. Computers are being used for simple tasks like printing of letters as well as for complex weapon designing work. These intelligent machines are used in railway stations, airports, super stores, banks, manufacturing units and at home. People of all age groups use computers for their different needs. Computers have brought new revolutions in the areas of banking, sales and education. Regardless of the field of working, any person needs to have basic knowledge of computers to excel in his/her respective field. Due to this reason, the knowledge of computers is necessary for everyone. One should be able to understand the operation of computers and to use it in his/her field of working. One must have basic understanding of Internet, WWW and the uses of ...
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IoT Architecture,Protocols,Applications

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Architecture of IoT There is no single consensus on architecture for IoT, which is agreed universally. Different architectures have been proposed by different researchers. Three- and Five-Layer Architectures Figure 1:  Architecture of IoT (A: three layers) (B: five layers). The most basic architecture is a three-layer architecture [ 3 – 5 ] as shown in Figure  1 . It was introduced in the early stages of research in this area. It has three layers, namely, the perception, network, and application layers. (i) The  perception layer  is the physical layer, which has sensors for sensing and gathering information about the environment. It senses some physical parameters or identifies other smart objects in the environment. (ii) The  network layer  is responsible for connecting to other smart things, network devices, and servers. Its features are also used for transmitting and processing sensor data. (iii) The  application layer  is responsib...
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