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Network Topology

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Definition “Network   Topology   refers to layout of a   network   and how different   nodes   in a network are connected to each other and how they communicate.” Computer network topology is the way various components of a network are arranged. Network topologies define the layout, structure of network means it define the way in which different systems and nodes are connected and communicate with each. Factors to be taken into consideration while choosing a Network topology 1)  Scale of your project (in terms of number of components (devices) to be connected). 2)  Amount of traffic expected on the network. 3)  Budget allotted for the network i.e. amount of money you are willing to invest. 4)  Required response time Types of Physical Network Topologies 1)  Bus Topology 2)   Star Topology 3)   Ring Topology 4)   Mesh Topology 5)   Tree Topology 6)   Hybrid Topology 1) Mesh Topology In a mesh   network topology , each of the network node, computer and oth
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HTML Declaration(Document Types)

The document type declaration tag is first tag in your in your HTML document, before the other html tags. It  is not an HTML tag; it is an instruction that gives to the web browser about which version of HTML the page we are using. DOCTYPE Declarations In HTML 5 version<!DOCTYPE html> In HTML 4.01 version This DTD consist all HTML tags. but no include deprecated tag for example  font. Frames are not allowed in this version. <!DOCTYPE HTML PUBLIC "-//Type here.../DTD HTML 4.01//EN" >
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Structure of an HTML File

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At the foundation of every HTML file is a set of structure tags that divide an HTML file into a head section and a body section. These two sections are enclosed between an opening <HTML> tag and end with the closing </HTML> tag. Following is a simple example of an HTML file that highlights the structure tags that are required within every XHTML file: Head Section   Contains the tile of webpage and information pertaining to the entire Web page. Contains any “meta” tags. The meta tag shown in the example below is required in all XHTML files. Nothing in the head section is visible in the browser window except for the title, “My Webpage” that is found between the title tags (<title>My Webpage</title>).  Body Section Contains the file contents that are visible in the browser window. In other words, whatever you find within the body tags is what you will see in the browser window! Viewed in its entirety using a browser, the Web page would loo
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Introducing HTML

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HTML stands for  H yper t ext  M arkup  L anguage, and it is the is a language used to develop Websites or Pages. HTML is also Known as markup language. Like author languages HTML also code.    Hypertext  refers to a text by clicking on that text the user redirect to linked document. Markup Language  HTML is also markup language because its tags tells the web browser How to display the content withhin tags. What is an html File? HTML is a format that tells a computer how to display a web page. The documents themselves are plain text files with special "tags" or codes that a web browser uses to interpret and display information on your computer screen.   ƒ    HTML stands for Hyper Text Markup Language ·            ƒ    An HTML file must have an .htm or .html file extension Why is HTML important? •     HTML is the foundation of all Web pages. •     For the same reasons we learn how to perform mathematical operations long-hand before we use a       calculato
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Array

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An array is a linear collection of finite number of homogeneous data elements that store in a successive memory locations. Size of array  In case start index zero. size=Upper Bound-Lower Bound+1 In case start index one. size=Upper Bound TYPES OF ARRAY One dimensional array Two dimensional array Multi dimensional array ONE DIMENSIONAL ARRAY One dimensional array is a  array in which each element of array refer by single or one subscript. Example:-A[1],A(1) TWO DIMENSIONAL ARRAY Two dimensional array is array in which each element of array is refer by two subscript.Two dimensional array structure require to store data in a form of table. Example:-A[1,2],A(1,2) MULTI DIMENSIONAL ARRAY Multidimensional array is array in which each element of array reffer by two or more subscript.  Example:-A[1].......A[n]; LINEAR ARRAY A linear array is a list of a finite number n of homogeneous data elements such that the elements of the array are stored in su
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Operating system

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An operating system is a program that acts as an interface between the software and the computer hardware. It is an integration set of specialized programs that are used to manage overall resources and operations of the computer. It is a specialized software that controls and monitors the execution of all other programs that reside in the computer, including application programs and other system software. Example of Operating system Window 95 Window vista Window 7 The main  Goals  and  Objective  of Operating system are: To make a computer user friendly. Proper utilization of computer resources. To hide the details of the hardware resources from the users. To provide users a convenient interface to use the computer system. Characteristics of Operating System   Memory Management  - It keeps track of primary memory, i.e. what parts of it are in use by whom, what parts are not in use, etc. Allocates the memory when the process or program requests it. Processor Man
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