This document discusses information technology topics including the internet, network topologies, hosts, networking devices, web browsers like Internet Explorer, Safari, Google Chrome and Firefox. It also covers HTML tags for formatting text, links, images, tables and more. The document was prepared by several individuals and instructor Dr. Mark N. Abadiano to discuss key aspects of information technology.

1. Information Technology- Dr. Mark N. Abadiano

2. Information Technology- Dr. Mark N. Abadiano
The Internet
-is a global network providing a:
• variety of information and
•communication facilities
consisting of interconnected networks using
standardized communication protocols.

3. Information Technology- Dr. Mark N. Abadiano
Advantages of the Internet
 Faster Communications
 Abundant Information Resources
 Inexhaustible Education
 Entertainment for Everyone
 Social Networking and Staying Connected
 Online Services and E-Commerce

4. Information Technology- Dr. Mark N. Abadiano
Disadvantages of the Internet
• Theft of Personal Information
• Spamming
• Malware Threats
• Age Inappropriate Content
• Social Isolation, Obesity and Depression

5. Information Technology- Dr. Mark N. Abadiano
Network Topologies
Topology- the structure of network.
2 Parts of Topology
 Physical Topology -actual layout of the wire(media)
 Logical Topology -how media is accessed by hosts

6. Information Technology- Dr. Mark N. Abadiano
Types of Topologies
1. BUS Topology
2. RING Topology
3. Star Topology

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Types of Topologies
4. EXTENDED STAR Topology
5. MESH Topology
6. HIERARCHICAL Topology

8. Information Technology- Dr. Mark N. Abadiano
HOST
-Devices that connects directly into network segment
Host includes:
 Computer
 Both clients and servers
 Printers
 Scanners
 Other devices

9. Information Technology- Dr. Mark N. Abadiano
• Network Interface Card (INC)
— printed circuit board that fits into the
Expansion slot of a bus on a
computer’s motherboard or peripheral devices.

10. Information Technology- Dr. Mark N. Abadiano
 Repeater
— an electronic device that receives a signal
and retransmits it a higher level so
signal can cover longer distances.

11. Information Technology- Dr. Mark N. Abadiano
 Bridge
— device which has two parts
 Switch
— concentrate connectivity, while making data
transmission more efficient

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 Router
— examine packets and chooses best path for them
In a network and switch them to
The proper outgoing port

13. Information Technology- Dr. Mark N. Abadiano
Different Web Browsers
1. Internet Explorer
— First component of Windows used in 1995
 Supports:
• Java
• RSS
• CSS
• JavaScript
• ActiveX
*for downloading videos, songs, or
software

14. Information Technology- Dr. Mark N. Abadiano
1. Internet Explorer
 Pros:
 Free to download at no cost
 Offers help option
 Provides speed and functionality
 Easy to use
 Mostly used throughout the world

15. Information Technology- Dr. Mark N. Abadiano
1. Internet Explorer
 Cons:
 There are bugs
 Microsoft is unaware of finding bugs
 Slow installation
 Lack of built in features
 Confusion between versions
 Lack of cross platform experience

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2. Safari
—Web browser produced and developed by apple
— Functions on a Mac OX, iOS, and windows system
— First out in public in January 7, 2003
— Generally for Mac user

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2. Safari
Pros:
 Easy to use
 Page-load times impressive
 Provides all security features
 Cleans up unnecessary junk
 Great for Mac user

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2. Safari
 Free to Download
 Speed compatibility
 Extremely fast to
download for Mac users

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2. Safari
 Cons:
 Lack of customization options
 Support system may be missing
 Trouble with Google built-in search engine
 Difficulty deleting cookies on exit automatically

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3. Google Chrome
—Freeware browser created by Google
—First released on Windows OS
—Launched on September 2, 2008

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3. Google Chrome
 Pros:
 Fast browsing performance
 More control over your tabs
 More dynamic homepage
 More speed and won’t slow down

22. Information Technology- Dr. Mark N. Abadiano
3. Google Chrome
 Makes searching so much simpler
 Easy to use
 Great security
 Free to download at no cost
 Built-in Flash and PDF support
 Has sync capabilities

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3. Google Chrome
 Cons:
 Lack of parental control
 Minor site incompatibilities
 Graphic acceleration doesn’t work

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4. Firefox
— Free and open source web browser
— Coordinated by Mozilla Corporation and Mozilla Foundation
— First version released: November 9,2004
— Now available on 78 languages worldwide

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4. Firefox
 Pros:
More secure privacy mode
More intuitive navigation
Contain minimalist interface
Offers lot of help and support
Ease of use

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4. Firefox
 More customization
 Speed and more compatible
 Easy to have add-on
 Free to download at no cost

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4. Firefox
 Cons:
 No thumbnail preview or mouse gestures
 Resource heavy

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(Hypertext Mark-up Language)
— set of text command used to format webpage

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(Hypertext Mark-up Language)
 HTML tag
— code element that tells the web browser what to do.
— Appears as letters or words between:
• < (less than sign
• > (greater than sign)
• / (forward slash) tells the web browser to “end”.

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(Hypertext Mark-up Language)
 Basic Tags
 <h1> Largest Heading <h1>
 <h2> ………………….….. <h2/>
 <h3> ……………………… <h3/>
 <h4> ……………………… <h4/>
 <h5> …………………….. <h5/>
<h6> Smallest Heading<h6/>

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(Hypertext Mark-up Language)
 Formatting Tags
<b> bold <b/>
 <code> com code <code/>
<em> emphasized <em/>
<i> italized <i/>
<small> smaller text <small/>
<pre> preformatted <pre/>

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(Hypertext Mark-up Language)
 Links
Ordinary link
 <a href=http://www.briese.com/”>Lin-text here</a>
 Image-link
 <a href=“http://www.briese.com/”><img src=“URL”
alt=“Alternate Text”><a/>
 Mailto link
 <a rhef=mailto:webmaster@briese.com>Send e-mail</a>

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(Hypertext Mark-up Language)
 Boomarks
 <a id=“tips”>Tips Section </a>
<a rhef=“#tips”>Jump to Tips Section</a>
Images
 <img src=“URL” alt=“Alternate Text” height=“42”
width=“42”>

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(Hypertext Mark-up Language)
 Styles/Sections
 <style type=“text/cost”> h1 {color:red;} p {color:blue;}
</style>
 Unordered List
 <u><li>Item</li><<u/>
 Ordered List
 <ol><li>First Item</li></ol>

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(Hypertext Mark-up Language)
 Tables
 <Table border=“1”>
<tr><th>table header</th></tr>
<tr><td>table data</td>
</table>
Iframe
<iframe>=“demo_form.asp.html”>>/iframe>
=

36. Information Technology- Dr. Mark N. Abadiano
Prepared By:
D/C Narciso, John Blitzkrieg
D/C Mendez, Welson D.
D/C Paquibot, Marlon
D/C Muego, Vincent Mel
D/C Moratin, Jericho
Engr. Mark N. Abadiano
Information Technology Instructor