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Computer networking

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What is a Computer Network ? 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 Share Resources from one computer to another Create files and store them in one computer, access those files from the other computer(s) connected over the network Connect a printer, scanner, or a fax machine to one computer within the network and let other computers of the network use the machines available over network. Following is the list of hardware's required to setup a computer network. Network Cables Distributors Routers Internal Network Cards External Network Cards Network Cables Network cables are used to connect computers. The most commonly used cable is Category 5 cable RJ-45. Distributors A computer can be connected to another one via a serial port but if we need to connect many computers to produce a network, this serial connection will not w
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Difference between Internet and Intranet

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Internet 1. Internet is wide network of computers and is open for all. 2. Internet itself contains a large number of intranets. 3. The number of users who use internet is Unlimited. 4. The Visitors traffic is unlimited. 5. Internet contains different source of information and is available for all. Intranet 1. Intranet is also a network of computers designed for a specific group of users. 2. Intranet can be accessed from Internet but with restrictions. 3. The number of users is limited. 4. The traffic allowed is also limited. 5. Intranet contains only specific group information. Therefore the Internet is an open, public space, while an intranet is designed to be a private space. An intranet may be accessible from the Internet, but it is protected by a password and accessible only to authorized users.
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full form of computers

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Computer & Internet Related Terms, Abbreviations PC – PERSONAL COMPUTER COMPUTER  – COMMONLY OPERATING MACHINE PARTICULARLY USED FOR TECHNOLOGY ENTERTAINMENT AND RESEARCH HTML – HYPER TEXT MARKUP LANGUAGE AJAX–ASYNCHRONOUS JAVASCRIPT AND XML ORACLE–OAK RIDGE AUTOMATIC COMPUTER AND LOGICAL ENGINE RDBMS–RELATIONAL DATABASE MANAGEMENT SYSTEM SQL–STRUCTURED QUERY LANGUAGE XML–EXTENSIBLE MARKUP LANGUAGE PERL–PRACTICAL EXTRACTION AND REPORT LANGUAGE PHP–HYPERTEXT PREPROCESSOR ASP–ACTIVE SERVER PAGES API–APPLICATION PROGRAMMING INTERFACES XHTML–EXTENSIBLE HYPERTEXT MARKUP LANGUAGE CSS–CASCADING STYLE SHEETS ASCII–AMERICAN STANDARD CODE FOR INFORMATION INTERCHANGE XSL- EXTENSIBLE STYLE SHEET LANGUAGE J2EE- JAVA 2 PLATFORM ENTERPRISE EDITION JSP- JAVA SERVER PAGE VBS – VISUAL BASIC SCRIPTING LANGUAGE JS – JAVA SCRIPT 3GP – 3RD GENERATION PROTOCOL 3GPP – 3RD GENERATION PARTNERSHIP PROJECT AAC – ADVANCED AUDIO CODEC AC3 – DOLBY DIGITAL
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excel shortkeys

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Excel keyboard shortcuts Shortcut key Action Menu equivalent comments version Ctrl+A Select All None All Ctrl+B Bold Format, Cells, Font, Font Style, Bold All Ctrl+C Copy Edit, Copy All Ctrl+D Fill Down Edit, Fill, Down All Ctrl+F Find Edit, Find All Ctrl+G Goto Edit, Goto All Ctrl+H Replace Edit, Replace All Ctrl+I Italic Format, Cells, Font, Font Style, Italic All Ctrl+K Insert Hyperlink Insert, Hyperlink Excel 97/2000 + Ctrl+N New Workbook File, New All Ctrl+O Open File, Open All Ctrl+P Print File, Print All Ctrl+R Fill Right Edit, Fill Right All Ctrl+S Save File, Save All Ctrl+U Underline Format, Cells, Font, Underline, Single All Ctrl+V Paste Edit, Paste All Ctrl W Close File, Close Excel 97/2000 + Ctrl+X Cut Edit, Cut All Ctrl+Y Repeat Edit, Repeat All Ctrl+Z Undo Edit, Undo All F1 Help Help, Contents and Index All F2 Edit None All F3 Paste Name Insert, Name, Paste All F4 Repeat last action Edit, Repeat. Works while not in Edit mode. All F4 While
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