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Javascripting

Monday, 17 August 2015

JavaScript is the programming language of HTML and the Web.
Programming makes computers do what you want them to do.
JavaScript is easy to learn.

An example of Javascript:

My First JavaScript



The example use the following code:
<h1>My First JavaScript</h1>

<button type="button"
onclick="document.getElementById('demo').innerHTML = Date()">
Click me to display Date and Time.</button>

<p id="demo"></p>
Another example of Javascript on button click.
<script>
function myFunction() {
    window.alert('You clicked the button!'); 
}
</script>

<button onclick="myFunction()" type="button">Click Me!
</button>

Computer Network

What is Computer Network

A computer network, often simply referred to as a network, is a collection of computers and devices interconnected by communications channels that facilitate communications and allows sharing of resources and information among interconnected devices.

Networks may be classified according to a wide variety of characteristics such as medium used to transport the data, communications protocol used, scale, topology, organizational scope, etc.

Source: http://kingofnetworking.weebly.com


Common Type of Network

Local Area Network - LAN

Source: furiousnet.com

A computer network that spans a relatively small area. Most LANs are confined to a single building or group of buildings. However, one LAN can be connected to other LANs over any distance via telephone lines and radio waves.  

 
Most LANs connect workstations  and personal computers. Each node (Individual computer) in a LAN has its own CPU with which it executes programs, but it also is  able to access data and devices anywhere on the LAN. This means that many users can share expensive devices, such as laser printer, as well as data. Users can also use the LAN to communicate with each other, by sending e-mail or engaging in chat sessions.


Metropolitan Area Network - MAN

Source: readanddigest.com

Metropolitan Area Network is a network which connects the users with computer resources in a geographical region which is larger than LAN or covered by a large local area network but smaller than the area enclosed by WAN.  This network is also employed to the linkage of various local area networks through connecting them with the strong lines. There are three major technologies are used to develop the MAN (Metropolitan Area Network) that include ATM (Asynchronous Transfer Mode), SMDS (switched multi megabit data service) and FDDI (fibre distribution data interface). General example of MAN derived service includes cable connections for television in different blocks of any city.




Wide Area Network - WAN 

Source: furiousnet.com

A wide are network (WAN) is a computer network that covers a broad area (i.e. any network whose communications links cross metropolitan, regional, or national boundaries), This is in contrast (Advance) to LAN (Local Area Network), which are usually limited to a room, building, campus.


WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate in other locatins. Many WANs are built for one particular organization and are private. Others, built by Internet service providers, provide connection s from an organizations LAN to the internet. WANs are often built using leased lines. At each end of the leased line, a router connects to the LAN on one side and a hub within the WAN on the other. Best example of WAN is the Internet. 


Google Docs and Sheets

Google Docs

Google Docs, Sheets and Slides are a word processor, a spreadsheet and a presentation program respectively, all part of a free, web-based software office suite offered by Google within its Google Drive service. The suite allows users to create and edit documents online while collaborating with other users in real-time.
The three apps are available as web applications, as Chrome apps that work offline, and as mobile apps for Android and iOS. The apps are compatible with Microsoft Office file formats. The suite also consists of Google Forms (survey software), Google Drawings (diagramming software) and Google Fusion Tables (database manager; experimental). While Forms and Tables are only available as web applications, Drawings is also available as a Chrome app.
The suite is tightly integrated with Google Drive. All files created with the apps are by default saved to Google Drive.

This is an example of of Word Document hosted on Google’s: Lab 1
This is an example of Excel Document hosted on Google’s: Data.xls

What Is Web Site?

A Web site is a related collection of World Wide Web (WWW) files that includes a beginning file called a home page. A company or an individual tells you how to get to their Web site by giving you the address of their home page. From the home page, you can get to all the other pages on their site.

Source: searchsoa.techtarget.com

A site on the World Wide Web. Each Web site contains a home page, which is the first document users see when they enter the site. The site might also contain additional documents and files. Each site is owned and managed by an individual, company or organization.

Source: webopedia.com

Virtual location on WWW, containing several subject or company related webpages and data files accessible through a browser. Each website has its own unique web address (see uniform resource locator) which can be reached through an internet connection. The opening page of a website is usually called homepage which contains hyperlinks to other pages on the same or other site(s). A single web server may support multiple websites and a single website may reside on multiple web servers, sometimes thousands of miles apart.

Source: businessdictionary.com

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