S Week 8 - 12

T

Use new time

O

Use original time

M

Advance on mouse click

R

Re-record slide narration and timing

Alt+P

Media- Play/Pause

Alt+Q

Media - Stop playback

Alt + HOME/END

Media - Got to previous/next bookmark

Alt+Down/Up

Media- Volume down-up

Alt-Shift+Left/Right

Media - Skip backward/forward

Alt+U

Media - Mute/Unmute

Ctrl + P

Change pointer to pen

Ctrl + I

Change pointer to highlighter

Ctrl + A

Change pointer to arrow

Ctrl + E

Change pointer to eraser

Ctrl + M

Show/Hide ink markup

E

Erase drawing on screen

Ctrl + L

Change pointer to laser pointer

N
left click
space
right-down arrow
enter
page down

Advance to the next slide

P
Backspace
left-up arrow
page up

Return to the previous slide

Right click

Popup menu/previous slide

escp

End slide show

Data

consist of raw facts and figures.

Information

the process form of data. Data is not certain while information is certain.

DATA COMMUNICATION

Electronically transmission of data from one place to another by using a medium.

DATA COMMUNICATION

The transmission of digital data between two or more computers and a computer
network or data network is a telecommunications network that allows computers to
exchange data.

Sender
Medium
Receiver

3 Components of Data Communication

DATA TRANSMISSION MODES

The way of transmission of data from one place to another

Simplex Mode
Half duplex Mode
Full duplex Mode

3 Transmission Modes

Simplex Mode

• Data can flow only in one direction

• Not moved in both direction, one way street

• Not perform both action either send or receive data

• Direction of flow not changes.

Half duplex Mode

• Data can flow in both directions but not at same time

• One way at a time

• Device with half duplex mode can send and receive data but not at the same time.

Full duplex Mode

• Data can flow in both directions simultaneously

• Fast speed

Digital Data Transmission
Analog Data Transmission

2 Forms of Data Transmission

Analog Data Transmission

• In the form of wave called carrier wave

• The number of wave repeats during a specific time known as frequency

• The height of carrier wave is called amplitude

Digital Data Transmission

• Digital Signals are transmitted in sequence of voltage

• Represented in binary forms

Asynchronous Transmission
Synchronous Transmission

2 Types of Data Transmission

Synchronous Transmission

- Data is transmitted block by block. No gap in data that’s why it is faster.

Asynchronous Transmission

- Data is transmitted character by character. There is regular gap between characters in
data transmission.

COMPUTER NETWORK

• It is a set of two or more computers connected through to share information and other resources.

• A system of interconnected computers and computerized peripherals such as printers.

• This interconnection among computers facilitates information sharing among them. Computers may connect to each other by either wired or wireless media.

Personal Area Network
Local Area Network
Metropolitan Area Network
Wide Area Network
Internetwork

5 Computer Network Types

Internetwork

It is the largest network in existence on this planet.

Wide Area Network

this network covers a wide area which may span across provinces and even a whole country

Metropolitan Area Network

generally expands throughout a city such as cable TV network.

Local Area Network

A computer network spanned inside a building and operated under single administrative system is generally termed as __________.
It usually covers an organization’s offices, schools, college/universities etc.

Personal Area Network

is smallest network which is very personal to a
user.

Network Topology

is the way computer systems or network equipment connected to each other.

Point-to-point
Bus Topology
Star Topology
Ring Topology
Mesh Topology
Tree Topology
Daisy Chain
Hybrid Topology

8 types of Computer Network Topologies

Point-to-point

contain exactly two hosts

Bus Topology

all devices share a single communication line
or cable.

Star Topology

are connected to a central device, known as Hub device, using a point-to-point connection.

Ring Topology

each host machine connects to exactly two other machines, creating a circular network structure.

Mesh Topology

In this type of topology, a host is connected to one or two or more than two hosts

Tree Topology

Also known as Hierarchical Topology, this is the most common form of network topology
in use present day.

Daisy Chain

This topology connects all its hosts in a linear fashion. Similar to Ring topology, all hosts in this topology are connected to two hosts only, except the end hosts.

Hybrid Topology

A network structure whose design contains more than one topology

INTERNET

is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals

access provider

is a business that provides individuals and organizations access to the Internet free or for a fee.

IP address

is a number that uniquely identifies each computer or device connected to the Internet

domain name

is the text version of an IP address

DNS server

translates the domain name into its associated IP address

World Wide Web

consists of a worldwide collection of electronic documents

Web site

is a collection of related Web pages and associated

Web server

is a computer that delivers requested Web pages to your computer

Web 2.0

refers to Web sites that provide a means for users to interact

Web browser or browser

allows users to access Web pages and Web 2.0

home page

is the first page that a Web site displays

links

Web pages provide _____ to other related Web pages

Downloading

is the process of receiving information

URL or Web address

A Web page has a unique address called a _____

Tabbed browsing

allows you to open and view multiple Web pages in a single Web browser window

Multimedia

refers to any application that combines text with graphics, animation, audio, video, and virtual reality

Graphics

– is a digital representation of nontext information

Tumbnail

is a small version of a larger graphic

Animation

is the appearance of motion created by displaying a series of still images in sequence

Audio

includes music, speech, or any other sound.
You listen to audio on your computer using audio player

Streaming

is the process of transferring data in a continuous and even flow.

Video

consist of images displayed in motion

Virtual Reality

is the use of computers to simulate a real or imagined environment that appears as a three-dimensional space.

1. Business to consumer (B2C)

2. Business to Business (B2B)

3. Consumer to consumer (C2C)

3 Types of e-commerce

E-mail

is the transmission of messages and files via a computer network

e-mail program

allows you to create, send, receive, forward, store, print, and delete email messages

mailing list

is a group of e-mail names and addresses given a single name

Subscribing

adds your e-mail name and address

Unsubscribing

removes your name

Instant messaging (IM)

is a real-time Internet communications service

chat

is a real-time typed conversation that takes place on a computer

chat room

is a location on an Internet server that permits users to chat with each other

VoIP (Voice over IP)

enables users to speak to other users over the Internet.
Also called Internet TELEPHONY

newsgroup

is an online area in which users have written discussions about a particular subject

message board

is a Web-based type of discussion group

FTP (File Transfer Protocol)

is an Internet standard that permits file uploading and
downloading with other computers on the Internet

Netiquette

is the code of acceptable Internet

SECURITY

We must secure our computers with technology in the same way that we secure the doors to our homes,

SAFETY

We must act in ways that help protect us against the risks that come with internet use.

• Viruses

• Worms

• Trojans

• Spyware

• Adware

5 PRIMARY ONLINE RISKS AND THREATS
 Computer

• Online fraud and phishing

• Hoaxes

• Identity theft

• Spam

4 PRIMARY ONLINE RISKS AND THREATS
 To Personal Information

Viruses/Worms

Software programs designed to invade your computer and copy, damage, or delete your data.

Computer Virus

Affects a computer negatively by altering the way the computer works

Worms

Copies itself repeatedly, using up resources and possibly shutting down the computer or network

Trojans

• Viruses that pretend to be helpful programs while destroying your data, damaging your computer and stealing your personal information

• A malicious program that hides within or looks like legitimate program

Rootkit

Program that hides in a computer and allows someone from a remote location to take full control