I/O Library Header Files: There are following header files important to C++ programs: The standard output stream (cout): The predefined object cout is an instance of ostream class. The cout object is said to be "connected to" the standard output device‚ which usually is the display screen. The cout is used in conjunction with the stream insertion operator‚ which is written as << which are two less than signs as shown in the following example. -------------------------------------------------
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Components and Devices Objectives This chapter covers the following CompTIA-specified objectives for the “Media and Topologies” and “Protocols and Standards” sections of the Network+ exam: 1.6 Identify the purpose‚ features‚ and functions of the following network components: . Hubs . Switches . Bridges . Routers . Gateways . CSU/DSU . Network interface cards (NICs) . ISDN adapters . Wireless access points (WAPs) . Modems . Transceivers (media converters) . Firewalls . A wide range of devices is used
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Video 1.06 Storage Devices Hard Drives Hard drives are comprised of platters Read/Write heads for each platter Read and write on top and bottom of platter Never exposed to magnets Data loss may occur 137 GB Limit Hard Drive size limited to 137GB Not a physical limit Limited by address the system can support 28 bit communications limited to 268‚435‚555 addresses equates to 137 GB Flash BIOS to upgrade hard drive interfaces PATA‚ SATA‚ SCSI‚ USB‚ and FireWire most common is the
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It is always slower to access data from backing storage than from internal memory. Fixed hard disks A hard-drive built into the case of the computer is known as ‘fixed’. Most computers have one. Fixed hard-drives act as the main backing storage device. They provide almost instant accsess to files (random access and high access speeds) Large storage capacity Stores and retrieves data much faster than a floppy disk or CD-ROM Data is not lost when you switch off the computer Usually fixed inside
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Communication devices Types Communication Devices FAX E-MAIL VIDEO CONFERRENCE PORTABLE MEDIA PLAYERS BLUETOOTH COMPUTERS FAX Fax is short for ‘facsimile’ which means ‘copy’. A fax machine is a device that can send a copy of a paper document over the telephone network. The sending fax converts the light/dark areas of the printed document into noises. These noises travel through the phone system and are received by another fax machine. The receiving fax machine converts the noises into printed
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Input Devices QWERTY Keyboard The keyboard is the most common type of input device. In other countries‚ the keyboard layout is different due to their different language and characters. There are some variations of keyboards to the normal keyboard. Some are wireless which means that no wire is required to connect it to the PC; and some have ergonomic design‚ which have a special design in order to reduce muscular stress on the user. Mouse The mouse is a pointing device which is used to move
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Theory Notes Task: Output Devices Make sure that you are familiar with all of the information detailed in this booklet. There are a number of tasks for you to carry out‚ be sure to read the information fully whilst completing the tasks. You could be asked about any of this in the test! Use the theory notes in from the teach-ict.com site to help you complete this booklet. TASK 1: OUTPUT DEVICES Output devices let you see data that has been processed or is stored on the hard disk
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Pointing Devices are direct entry input devices. They allow users to control the pointer and the insertion point on the screen. Examples of pointing devices are mouse‚ trackball‚ touch pad‚ pointing stick‚ joystick‚ touch screen‚ light pen and graphics tablets. A mouse is a computer device‚ which has a ball sealed at the bottom. It is attached with a cable to the system unit. When rolled on the flat surface‚ the movement of the ball will generate electrical circuits‚ which are then sent to the
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Transitional Devices (Connecting Words) Brought to you by the Purdue University Online Writing Lab at http://owl.english.purdue.edu Transitional devices are like bridges between parts of your paper. They are cues that help the reader to interpret ideas in the way that you‚ as a writer‚ want them to understand. Transitional devices help you carry over a thought from one sentence to another‚ from one idea to another‚ or from one paragraph to another with words or phrases. And finally‚ transitional
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Task: Using the Internet‚ list and define at least five different types of storage devices from the most reliable to the least reliable. Include in your search cost and availability of the storage devices. Include names of vendors for these storage devices. There are three main types of consumer-grade computer storage: internal‚ external‚ and network attached. Internal storage is generally a hard drive or solid-state drive (SSD) that hosts computer’s operating systems and programs. External
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