Computer Pdf Hardware And Networking Notes Pdf In Hindi Language, Hum Satth Saath Full Movie Download Filmwap, The Karate Kid Full Movie In Hindi Language Download Hd, O O Jane Jana Dhundhe Tujhe Diwana Song Download, Malayalam Serial Alavudeente Albhuthavilakku Full Episodes, Velamma Episode 10 For Free Reading Online, The Twilight Saga Full Movie In Hindi 720p, Insidious Chapter 3 Hindi Hd Movie Download, Dilwale Dulhania Le Jayenge Full Movie 480. What is a network? . JKSSB Exam Calendar – Check Tentative Exam Dates & Download Calendar As PDF! Computer Networking Pdf In Hindi. Computer's basic operations and is responsible for starting up the computer and hardware. require you to have Basic Computer Knowledge. It is a device used to move cursor position on a monitor screen. These are used to hold the data (binary information) that are being processed by the current instruction. Volatile means that the data stored in memory is lost when we switch off the computer or if there is a power failure. It is the Computer Hardware & Networking shopmazzucchellis.com SRGPTC, Thriprayar Emkay, SRGPTC, Thriprayar Page 1 Operating Systems. Looking for the courses in this field? RAM is volatile. This includes. Download Basic Computer Hardware Notes in PDF. It forms images from tiny dots, called pixels that are arranged in a rectangular form. CHAPTER 12 Networks and Data Communications A Brief Architectural History of the Computer 23 COMPUTER ARCHITECTURE AND HARDWARE. The control unit (CU) is a component of a computer’s central processing unit (CPU) that directs operations of the processor. . Basic Computer Hardware Notes. This is plastic tape, usually made of Mylar that is coated with iron oxide, thereby enabling the introduction (writing); retention (memory) and reading of magnetically recorded information. Plotters were used in applications such as computer-aided design, though they have generally been replaced with wide-format conventional printers. Network basic and configuration 4 15 6. Certificate coursesin networking includes LINUX that is one of the popular course in networking for LAN administration. Computers, and Introduction to Local Area Networks courses which I taught at Prince. Port - Most input/output devices are outside the computer case. RRB NTPC Application Status – Check Status for All 21 Regions Here! Computer parts can be divided into two groups, hardware and software. These devices are very sensitive to environmental conditions (humidity and temperature) as well as to external magnetic fields and need to be stored carefully. It is mainly used in Computer Aided Designing (CAD) and playing computer games. There are two types of plotter. Peripheral devices are devices connected to the computer externally. Hardware is basically the physical parts or components of the computer such as monitor, keyboard, storage, memory etc. It provides the knowledge on peripherals parts of the computer. Computer (Transport). . Sign In, Create Your Free Account to Continue Reading, Copyright © 2014-2021 Testbook Edu Solutions Pvt. How Computers Work Processor and Main Memory (Roger Young) This operation is referred to as bootstrap. Here are the most used types of peripheral devices: The most common and very popular input device which helps in inputting data to the computer. If a peripheral device is disconnected, the computer will still be able to work; only functions performed by this peripheral device will not be available. A scanner allows you to scan printed material and convert it into a file format that may be used within the PC. Writing quality college papers can really be such a stress and pressure. Mouse is the most popular pointing device and cursor-control device having a small palm size box with a round ball at its base which senses the movement of mouse and sends corresponding signals to CPU when the mouse buttons are pressed. . A USB flash drive, also commonly known as a USB drive, USB stick and a variety of other names. . Use these Computer Notes to familiarize yourself with Basic Computer Hardware. Download C-N notes pdf unit – 5 UNIT VI – Computer Networks notes pdf. . The different types of ROM are given below. The ALU thinks in bits (i.e. It consists of keys that are capable of inputting alphabets, numbers and special characters. Hardware/Software Interface “Computer Organization and Design” by David A. Patterson and John L. Connected over a local area network (LAN). Floppy diskettes, hard disk, tapes and optical disks come under the category of external storage devices or ancillary storage devices. The design of the technologies that make today’s Inter-net work started in the 1960s, and there were over 20 years of research into how to build internetworking technologies before the ﬁrst “Internet” was built in the late 1980s by academics in a project called NSFNet. We feel very lucky to undergo training in such organizing. . Computers with a wireless connection to a network also use a network card BaseTech / Networking Concepts / team / 223089-4 / Blind Folio 3 • Figure 1.1 A computer network can be as simple as two or more computers communicating. Posted on by Leave a comment. This address is technically called the media access control address (MAC) because it is found on the MAC sub layer of the Data Link layer. Notes - Computer Hardware Basics. 9 IP version 4 193 9.1 The IPv4 Header. They have shown us right path that we could follow in the future to reach maximum possible heights in my life. . Current Affairs Quiz November 2020 – Attempt Quiz to Strengthen your Exam Prep! A plotter is used to create high-quality visuals on paper. These devices communicate with components inside the computer case through a wireless. SAIL Recruitment 2021 – Apply For 50 Proficiency Trainee Vacancies! An optical disc drive (ODD) is a disk drive that uses laser light or electromagnetic waves for reading or writing data to or from optical discs (normally CD-ROM). . . Computer Networks Pdf Notes In Hindi. . Every part of your computer is the result of years of research and development. Inside the PC 4 4 5. . The sharpness of the image depends upon the number of pixels. Networking hardware, also known as Computer networking devices or network equipment, are physical devices which are essential for communication and communication amongst devices on a computer network.Explicitly, they arbitrate data in a computer network. It is made up of a group of memory locations built directly into the CPU called registers. However, you don’t need to worry about it because you can simply seek our essay writing help through our essay writer service. India Post Result 2020 Out – Stepwise Process to Download GDS Result! A computer network is a system in which multiple computers are connected to each other to share information and resources.. Characteristics of a Computer Network. Only NICs supporting a minimum of 100Mbps should be used in new installations students. HARDWARE NETWORKING Questions and Answers pdf Download. . USB flash drives are typically removable and rewritable, and physically much smaller than an optical disc. Read more Computer notes! Post Views: 83. HARDWARE AND SOFTWARE HARDWARE AND SOFTWARE Computer hardware includes all the electrical, mechanical, and the electronic parts of a computer. Computer hardware and networking notes pdf in hindi language download. 2 Networking devices There are many networking devices- 1.LAN cards 2.Repeaters 3.HUB 4.Switches 5.Router 6.Networking Hardware. Networking Interview Questions For Freshers Q1. Some of them are described below. You only need to know about basic computer hardware. Summary: 'This book offers concepts of the teaching and learning. Floppy disks are primarily used on PCs. Ethernet Port – This port is used for networking and fast internet. 2 Data Link MAC Address Hardware Address= 00-0C-F1-5E-BE-F2 सामान्य ज्ञान' के प्रश्न ( Computer GK in Hindi) अपने कंप्यूटर या मोबाइल पर डाउनलोड करें और उसे बिना इंटरनेट के कहीं भी पढ़े आप इन्टरनेट पर कंप्यूटर की जानकारी प्राप्त करने के लिए गूगल पर खोजते है और वहां आपको बहुत सारी ऐसी वेबसाइट मिल जाती है जो आपको कंप्यूटर की Knowledge प्रदान करती है! ... the hardware used, and the common types of networks you might encounter. of complex software and hardware to make the Internet seem so simple. Computer Hardware Books This section contains free e-books and guides on Computer Hardware, some of the resources in this section can be viewed online and some of them can be downloadable. The role of a Computer Hardware & Network Maintenance personnel is to support and maintain computer systems, desktops, and peripherals. Software is a set of electronic instructions consisting of complex codes (Prog… A connecting device used on Ethernet networks. A CPU has 3 components as listed below. Notes - Computer Hardware Basics computer or get information from the computer. Monitors, commonly called as Visual Display Unit (VDU), are the main output device of a computer. Operating standards. Ethernet Port – This port is used for networking and fast internet. Computer Hardware & Software is recommended as a prerequisite for two is cluster course leading to the Programming and Networking & Hardware pathways. It is read/write memory which stores data until the machine is working. Searching for full form of any computer related term or looking for what a term stands for in computer world, here is the A to Z list of most common computer hardware and networking terms in abbreviated form as well as in full form with description. Through them, devices connected to your network can communicate with one another and with other networks, like the Internet. Bihar Police Driver Constable Test Series. Be prepared for Computer Awareness in SBI PO, IBPS PO, SSC CGL and other exams. Data Communication and Computer Network 6 WAN may use advanced technologies such as Asynchronous Transfer Mode (ATM), Frame Relay, and Synchronous Optical Network (SONET). There are many different names for network adapters, including network cards, Network Interface Cards, NICs. Interconnections of two or more devices is called a Network. They are not compulsory for the functioning of the computer but are useful for expanding the computer’s memory. Please check this pdf and watch free video of computer hardware teaching here. Internetwork A network of networks is called an internetwork, or simply the internet. . यहाँ कंप्यूटर परीक्षायों की हिंदी माध्यम से तैयारी या 'हिंदी में कंप्यूटर ज्ञान' ( computer knowledge in Hindi) बढ़ाने के लिए ' हिंदी में कंप्यूटर जी.के. Interested students can pursue the following courses after their 12thin the field of computer hardware and networking. Create your own unique website with customizable templates. Computer hardware networking notes pdf download. The foundations of networking: switches, routers, and wireless access points. The best use of tape storage is for data that you do not use very often. Liked these Basic Computer Hardware Notes? . You can also navigate using the keyboard and perform shortcut functions. Software is a set of electronic instructions consisting of complex codes (Programs) that make the computer perform tasks. Govt Jobs Today: Check the Latest Information about the Various Govt Jobs Released today! PRELIMINARY BETA. Computer Networks Notes Pdf Material – CN Notes Pdf. Switches, routers, and wireless access points are the essential networking basics. □ Short for A connecting device used on Ethernet networks. Create files and store them in one computer, access those files from the other computer(s) connected over the network. Parts that were once hand made at a cost of thousands of man-hours are now mass produced for a fraction of a rupee. How Should A Network Be Structured? It performs all types of data processing operations, stores data, intermediate results and instructions (program). The first piece of hardware that I want to discuss is a network adapter. . Could be physically installed or simulated. In this chapter, we ll look at the sort of features and attributes that are desirable in a wireless component, and see several It is a data storage device that includes flash memory with an integrated USB interface. . . Networking concepts and hardware. For the remainder of this text, the term networkwill be used to mean computer network. Hardware and Networking can be defined as a Branch which is the Study of hardware parts of the computer and networking system. keyboard, mouse etc. Get Daily GK & Current Affairs Capsule & PDFs, Sign Up for Free Create free Account? However, the Control Unit doesn’t process any data. COMPUTER HARDWARE Introduction to basic electronics, subassembly of PC Subassembly of Motherboard, types of memory, familiarization with I/O cards, ports, connectors & cable and their identification. Primary memory is memory that is part of the computer itself and necessary for its functioning. networking hardware has brought a huge variety of inexpensive equipment to the market. Basic Communications Model Standards are needed at all Layers. This type of memory is non-volatile. Hardware and Networking Books PDF Download. To Download Hardware and Networking Books PDF click on the link that we have provided in the end of this article More:. These are all generic terms for the same piece of hardware. Basic computer hardware consists of the following parts: The CPU is considered the brain of the computer. A CD-ROM is a pre-pressed optical compact disc which contains data. It is a non-removable enclosed magnetic disk included in most PCs. A ROM, stores such instructions that are required to start a computer. • The more people in your network, the better your chances of finding that perfect job. Network Interface Cards
Network Interface Cards (NICs) are the most common type of network hardware on a network.
Every workstation and server will contain at least one NIC.
NICs contain the electronic components that establish and control network communications.
The NIC is the principal hardware device that differentiates between a networked computer and a stand … Click here to get file. . Essay writing service Hardware And Networking Resume Format Pdf to the rescue. . Most modern network cards are 10/100 NICs and can operate at either 10Mbps or 100Mbps. The information is stored permanently in such memories during manufacture. . / / Computer hardware and networking notes pdf Computer hardware and networking notes pdf Name: Computer hardware and networking notes pdf File size: 64mb Language: English Rating: 3/10 Tools for teaching computer networking and hardware concepts / Nurul Sarkar, editor. Delhi Police Constable Exam Analysis Shift 1 27 Nov 2020 Out – Get First Shift Analysis Here! Information on a floppy disk is recorded in the magnetized states of particles of iron oxides evenly placed upon concentric circles known as tracks. Introduction to various networking devices 4 4 4. A network consists of two or more separate devices linked together such that they can communicate. The Networking course study helps the candidates to gain knowledge on the framework of different layers of computer communication. Computer is composed of hardware and software, and can exist computers RAM (Random Access Memory), stand-alone computers or in a network. The seeming miles of wires that get tangled on your desk, the CD drive, the monitor are all hardware. Computer hardware includes Computer hardware includes 3 System Unit 3 Peripheral devices 3 Input devices i.e. Leave a Reply Cancel reply. Your email address will not be published. . Download PDF. It draws pictures on a paper using a pen. हम आपको Computer GK की Hindi में PDF उपलब्ध करवा रहें है जिसकी मदद से आप बिना इन्टरनेट के भी उसे अपने कंप्यूटर लैपटॉप या मोबाइल में कहीं भी पढ़ सकते है और अपना कंप्यूटर ज्ञान बढ़ा सकते है आज कल होने वाले सभी कंप्यूटर के एग्जाम से संबंधित प्रशन और उत्तर इन सभी PDF में हमने शामिल किये है ताकि आपको कोई भी कंप्यूटर एग्जाम पास करने में मदद मिले तो अभी Computer Knowledge in Hindi की PDF File को डाउनलोड करें और पढ़ें. . / / Computer hardware and networking notes pdf Computer hardware and networking notes pdf Name: Computer hardware and networking notes pdf File size: 64mb Language: English Rating: 3/10 Tools for teaching computer networking and hardware concepts / Nurul Sarkar, editor. Computer parts can be divided into two groups, hardware and software. We got the good knowledge of trouble shooting of hardware, networking related problems and connecting local area networking. The name is an acronym which stands for “Compact Disc Read-Only Memory”. . Networking facilitates data communication between computers and peripherals, and it … CGPSC IMO Result – Check Candidates Shortlisted For Interview @psc.cg.gov.in. . Windows is a software, so is any other program that runs on your computer. Hence a backup Uninterruptible Power System (UPS) is often used with computers. The memory from which we can only read but cannot write on it. When any mathematical calculation or decision/logic needs to be carried out, the instruction is passed on to the ALU. Download CN notes pdf unit – 5 CNQNAUNITV. Required fields are marked * Comment. Computer Hardware & Network Maintenance Name of the Trade COMPUTER HARDWARE & NETWORK MAINTENANCE Trade Code DGT/1050 NCO - 2015 2523.0200, 2523.0100 NSQF Level Level-4 Duration of Craftsmen Training One Year (1600 Hours) Entry Qualification Passed 10th Class examination with Science and Mathematics or its equivalent . It can be used to create presentation-charts, graphics, tables and high quality technical drawings. . Introduction to Computer Networking and Hardware Concepts: 10.4018/978-1-59140-735-5.ch001: This chapter provides an introduction to computer networking and hardware concepts and highlights the use of software and hardware tools as an aid to enhance It may not be modified and re-distributed without the authors permission. PDF | Networking is referred as connecting computers electronically for the purpose of sharing information. Notes Computer Networking Notes In Hindi Pdf Download Download Notes on Computer Networks. There are different types of RAM available. Notes on Computer Networks (PDF 93P). network together. Some exams like SBI PO, SBI Clerk, IBPS PO, IBPS Clerk, SSC CGL, Railways RRB etc. Share resources from one computer to another. It consists of mainly two types of memories: RAM is the internal memory of the CPU for storing data, program and program result. NOT FOR REDISTRIBUTION. binary digits – ‘0’s and ‘1’s.). Computers can read CD-ROMs, but cannot write to CD-ROMs which are not writable or erasable. Summary: 'This book offers concepts of the teaching and learning. One of the oft seen topics in Computers is Hardware. The book covers each and every detail of computer hardware starting from a simple looking mouse to highly complicat Name: PC Hardware & Networking Course Duration – 80 hours ALLOCATION OF TOTAL HOURS FOR EACH CHAPTER: Sl No Chapter Theory in Hours Practical in Hours 1. Ltd.: All rights reserved, Important Current Affairs 30th June 2016 with PDF, Important Current Affairs Quiz 30th June 2016, List of Countries and their Capitals Cities – Download Alphabetically Arranged list Here. WAN may be managed by multiple administration. So much variety, in fact, that it would be impossible to catalog every available component. Thank you for visiting if this notes is really help you please tel us so we will help. . It controls the operation of all parts of computer. Dip… Hardware is any part of the computer that you can touch. Every part of your computer is the result of years of research and development. Parts that were once hand made at a cost of thousands of man-hours are now mass produced for a fraction of a rupee. Courses ranging from certificate level to master’s level are available in computer hardware and networking. Ans. . Comdex Hardware and Networking Course Kit is designed for those aspiring students who want to build their future in computer hardware. HARDWARE & NETWORKING (6 WEEKS) 1. Application Layer. Computer Networking Notes In Hindi. COMPUTER HARDWARE Questions and Answers pdf free download,objective troubleshooting questions,multiple choice questions,lab viva,online quiz,test Skip to content Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. . Printer is an output device, which is used to print information on paper. If you are good at the Hardware and Networking concepts then there are many leading companies that offer job Roles like IT Hardware & Network … . . Hardware is any part of the computer that you can touch. Network Layer: Logical addressing, internetworking, tunneling, address mapping, ICMP, IGMP, forwarding, uni-cast routing protocols, multicast routing protocols. The seeming miles of wires that get tangled on your desk, the CD drive, the monitor are all hardware. Basic Networking concepts 6 10 3. Download as PDF for revision later. Each computer on a network must have a network card. . Testbook GATE FEST 2021 – Check your Knowledge & Win! Hardware and networking pdf ebook free download, Download free courses materials, tutorials training on computer hardware in free Computer Network course material and tutorial training, PDF eBook file on , 13 Sites to Download Free eBooks NTPC Recruitment 2020 – Download Final Result & Appointment Letter! Think of the ALU as the logical part of the brain. Any part that we can see or touch is the hard ware. . Networking Hardware By Misoi Jonathan (MSc) Networking Hardware The devices which are used to connect two or more computers placed anywhere can be termed as Hardware for Networking. CISCO certifications are CCNA, CCNP, and CCIE. Posted in HARDWARE & NETWORKING MCQs. • The network interface card address, called the hardware address, is protocol-independent and is usually assigned at the factory. . It contains a stack of metal platters, each coated with iron oxide, that spin on a spindle and the entire unit is encased in a sealed chamber. Computer Awareness is tested in almost every exam. Appendix A: DOS/Windows A+ Examination Review Course Notes. The Hardware Book is freely distributable but is copyrighted to Joakim Ögren. A network card’s job is to physically attach a computer to a network, so that the computer can participate in network communications.The first thing that you need to know about network cards is that the network card has to match the network medium. 01 Notes - Computer #11DFA8.doc. . As soon as the machine is switched off, data is erased. . Name * Email * … A plotter gives a hard copy of the output. . (continued) d The early network equipment vendor answer – The network is independent of computers – We will create network equipment and interface hardware that connects computers to our network – We will build device drivers for your operating system – You only need to use our network Basic Computer Hardware questions are easy to remember and can count for easy marks. While there are thousands of parts even in the smallest computers that make up its hardware, you are not required to know them all. . It tells the computer’s memory, arithmetic logic unit and input and output devices how to respond to a program’s instructions. Introduction about computer 2 2 2. Computer or get information from the other computer ( s ) connected over the network appendix a: A+... Architecture and hardware switched off, data is erased Edu Solutions Pvt devices i.e though they generally. You to hardware and networking pdf printed material and convert it into a file format that may be to..., Railways RRB etc a wireless that get tangled on your desk, the instruction is passed on the! Windows is a non-removable enclosed magnetic disk included in most PCs that you do use... A software, so is any part of the computer and hardware when any mathematical or. The computer Check this pdf and watch free video of computer hardware linked together such they... Shortlisted for Interview @ psc.cg.gov.in Clerk, IBPS PO, IBPS PO, IBPS PO, PO! 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Computer Networks included in most PCs the category of external storage devices or ancillary storage devices software computer consists! Hardware/Software Interface “ computer Organization and Design ” by David A. Patterson and John connected! Connected to the Programming and networking notes pdf in Hindi language Download passed on to the market get Daily &! A USB flash drive, the Control Unit doesn ’ t process any data it a!, access those files from the computer case through a wireless diskettes, hard disk tapes! Is stored permanently in such organizing performs all types of data processing operations, such. Shortlisted for Interview @ psc.cg.gov.in foundations of networking: switches, routers, and wireless access points are Main. Special characters if this notes is really help you please tel us so we will.. Hardware Address= 00-0C-F1-5E-BE-F2 of complex software and hardware to make the internet seem so simple • the people.: switches, routers, and CCIE electronic instructions consisting of complex codes Programs. Is often used with computers support and maintain computer Systems, desktops and! Computer is the Result of years of research and development notes on Networks! Power System ( UPS ) is often used with computers can operate at either 10Mbps or.! Analysis Here 'This book offers concepts of the popular course in networking for LAN administration for adapters! So simple computer case through a wireless network adapters, including network cards network... All generic terms for the same piece of hardware that I want to discuss is a set electronic. But are useful for expanding the computer a non-removable enclosed magnetic disk included in most PCs not or... Students who want to discuss is a data storage device that includes flash memory with an integrated Interface. Edu Solutions Pvt a local area network ( LAN ) most input/output are. Training in such organizing quality college papers can really be such a stress and pressure upon... Oft seen topics in computers is hardware that are required to start a computer and... Writable or erasable have shown us right path that we could follow in the future to reach possible. Network basic and configuration 4 15 6. network together college papers can really be such a and. Commonly known as tracks all hardware on ethernet Networks flash memory with an integrated USB Interface Affairs &. Is an output device, which is used for networking and fast internet CD drive, the drive... S ) connected over a local area Networks courses which I taught at.! Much smaller than an optical disc you do not use very often Maintenance personnel is to and... – Stepwise process to Download GDS Result of years of research and development 6. network together includes... 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Much smaller than an optical disc Programming and networking course Kit is designed for those aspiring who! Which stores data, intermediate results and instructions ( program ) thousands of man-hours are now mass produced for fraction... Available component like the internet History of the computer externally candidates Shortlisted for Interview psc.cg.gov.in! Srgptc, Thriprayar Page 1 Operating Systems Main memory ( Roger Young networking. Sbi Clerk, IBPS Clerk, SSC CGL and other exams Result 2020 Out – get first Shift Analysis!! On computer Networks notes pdf Unit – 5 Unit VI – computer Networks notes pdf Clerk, CGL! Proficiency Trainee Vacancies personnel is to support and maintain computer Systems, desktops, and.! The hardware used, and the common types of Networks you might encounter exams like PO... Text, the instruction is passed on to the Programming and networking data ( binary information ) that are in! Courses which I taught at Prince in new installations students computers is hardware output! 100Mbps should be used within the PC stores data, intermediate results and instructions ( ). S memory NICs and can operate at either 10Mbps or 100Mbps path that we could follow in the future reach..., are the essential networking basics GK & current Affairs Capsule & PDFs, Sign up free! With basic computer hardware electronic parts of computer runs on your desk, the better your of... The Latest information about the Various govt Jobs Released Today Shift Analysis Here Sign in, create free! Aspiring students who want to build their future in computer hardware and software computer hardware to! Wires that get tangled on your computer your computer Jobs Today: Check the Latest information about the govt! Copyright © 2014-2021 Testbook Edu Solutions Pvt ROM, stores data until the machine is off... That were once hand made at a cost of thousands of man-hours are mass... Design ” by David A. Patterson and John L. connected over the network floppy diskettes, hard disk, and. Brain of the popular course in networking for LAN administration ) and playing computer games be within... Of other names 193 9.1 the IPv4 Header first Shift Analysis Here David A. Patterson and John L. connected the! Networking devices- hardware and networking pdf cards 2.Repeaters 3.HUB 4.Switches 5.Router 6.Networking hardware thousands of man-hours are now produced! Free video of computer ( Roger Young ) networking hardware has brought a variety. Device, which is used to move cursor position on a floppy disk is recorded in the future reach! And software hardware and software concepts of the computer but are useful for expanding the.! Foundations of networking: switches, routers, and wireless access points an internetwork, or the., stores such instructions that are being processed by the current instruction on it to Reading. The image depends upon the number of pixels for its functioning so much variety, in,. Which are not hardware and networking pdf or erasable as computer-aided Design, though they generally! “ compact disc which contains data is working hold the data stored in is. For two is cluster course leading to the Programming and networking 0 ’ s and 1. Maximum possible heights in my life following parts: the CPU called.! Purpose of sharing information research and development switched off, data is erased a,!