1. Communications, Networks and Internet

2. Communication
This growth in communications technology has revolutionized the way the businesses work and keep in touch with staff and customers

3. Method of communication
Telephone
Internet- Facebook, Twitter,Tumblr,Gmail
Skype
Flair
MSN
MySpace
Letter
Sonar
Sounds
Facial expression
ICQ
Text message
BBM
Mix it
OOVOO
Speech

4. Network
A network consists of two or more computers that are linked in order to share resources e.g. exchange files, communicate
The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams
There are 2 types: WAN
LAN

5. Local area network (LAN)
Supplies networking capability to a group of computers in close proximity to each other such as in an office building, a school, or a home
A LAN is useful for sharing resources like files, printers, games or other applications
Advantages:
Software and data files can be shared
Users can work together on a single shared document
Users can communicate e.g. Messenger
Users can stream media, so they can view video and play audio
It saves time and money, to install the software on one main computer
You can share hardware devices and internet connection

6. Types of LAN Client networks: For those available to you to use
Server networks
Peer-to-peer networks:
Allows every computer to communicate directly
with every other computer in the network
A user can access data from any computer on the
network
Is limited to about 10 machines
Found in small businesses and departments

7. Cabled LAN vs. Wireless lan
All computers and other peripheral devices on the network are attached to cables that transmit data between them
A network cable is required
Uses's a wireless link to connect to the network
Slower transmission speed
Has 3 sets of components:
Wireless points
Wireless interface cards
Routers

8. Wide Area Network (wAN)
A large geographic area in a state, province or country
WANs often connect multiple smaller networks
The world's most popular WAN is the Internet
Information can be transmitted in many ways like high-speed telephone lines
The internet, school network, network of bank cash are WANs
LANs are often connected to WANs
WANs can be connected together using the internet, leased lines or satellite links
They are used by large companies, universities

9. Components of a wan Modem- is a Modulator-Demodulator
1ST created to take digital signals from a computer and convert them to analogue so
that they can be transmitted down a
telephone line
Speed at which a modem operates will affect the download time of web pages and files
Data transmission is basically the transmission of data from on location to another for direct use or for further processing
Bandwidth determines the volume of data that can be transmitted in a given time

10. What’s the internet
It’s a international network of networks that connects computers worldwide
It consist of:
WWW- World Wide Web
Forums where people can seek help and advice about a topic
Research database used by universities and large companies
USENET- discussion groups about a specific subject from the latest boy band to favorite pets e.g. Google Groups
and Instant Messaging system
Nobody owns it
Its made up of individual networks that someone has put together and then linked to the internet
The internet is not the same as the WWW

11. Connecting to the Internet-ISP
ISP- Internet Service Provider sells internet access to companies and individuals
It provides web servers which connect to the internet
Isp will provide its customers with a wide range of services….
Bandwidth options
serviced
Web hosting
Online and telephone assistance

12. Dial up or narrow band
The computer dials a phone number to connect to your ISP using a telephone line
Broadband
Single cable that can provide cable TV, telephone and internet services
Available over a telephone line or cable or mobile telephone network

13. Connecting to the internet- Hardware
Computer
Internal or external modem or similar device
Satellites
Fibre-optic cables
Radio wave

14. Connecting to the internet-others
Internet address
Every device on the internet has a unique address that identifies it. This address is a number called the IP address
The IP address could be static(it remains the same every time you connect to the internet) or dynamic (a temporary address that changes each time you can connect to the Internet)

15. Connecting to the internet- Software
Browser software allows users to view and use the
web pages on the internet:
An address bar
And navigation bar
A bookmark/favorites option
A search engine
A history button
A browser setting and internet options e.g. Filtering

16. World Wide Web (WWW)
It’s a multimedia service that runs on the internet
The web consist of hypertext and hypermedia documents
This documents contain hyperlinks to other documents located on the same computer or an another computer in any part of the world
All the information that can be accessed via the internet is often called Cyberspace

17. Components of a wan
The higher the bandwidth, the quicker the data will flow along the line……
Web pages load quicker
Multimedia is downloaded faster
Internet connection is faster
Less network traffic
Quicker response time

18. Broadband ISND: Integrated Services Digital Network
Supports video conferencing, faxes and voice applications
Users still must dial up
High speed digital transfer
Its permanently switched on

19. Difference between stand-alone and workstation
A stand-alone PC works on its own
A workstation is connected to a network, you can freely share your files and databases to other PC.

20. How can you tell whether a computer is networked to other computers
It allows you to send messages to a friend who is working on another computer
A message will tell you that you are entering a networked system when you logon
You have a choice to chose your printer
You have a file server

21. A file server
Is a powerful computer that runs the network operating system and allows resources to be shared over the networked by other devices and computers connecting to it
These devices could include printers, disks,drives,CD-ROM drives, camera,etc
Must be kept in a cool temperature room
Has to be in a dust free room
Has to be in a secured room

22. Print server
Coordinates printing on the network

23. Bluetooth vs. Wi-Fi 10 meters Notebook, PC, desktop
Mobile phones, mouse, keyboards
Simple to use
Low cost
Developed in 1994
Notebook, PC, desktop
100 meters
More complex
High cost
Developed in 1991

24. What can you do on the internet and the web
View web pages
Use a search engine to find pages you want
Send and receive
Shop online (e-commerce)
Bank online (e-commerce)
Gamble online (e-commerce)
Access customers support
Software download and distribution
Access and discuss information via mailing lists, bulletin boards and new groups
Chat online
Video conferencing
Online radio
Web broadcast
Set up your own website or blog or wiki
Social networking

25. Research on any 2 of the following:
Online shopping
Online banking
Web broadcasting
Social networking sites
Discuss the disadvantages and advantages
Discuss the impact on society

26. Social networking sites

27. Social networking It's the way the 21st century communicates today
Social networking often involves grouping specific individuals or organizations together
There are a number of social networking websites that focus on particular interests
You can become a member to any website, no matter what their hobbies, beliefs, or views are
You communicate with new people and old friends, so you can stay connected

28. Advantages of social network
It's cheaper to use online social networking for both personal and business use because most of it is usually free e.g. Facebook
A social networking site can be a good way to make connections with people with similar interests
Meeting people and staying connected with classmates and friends is a huge benefit of social networking sites
It can be a great way to understand and stay connected to your community as a whole

29. Disadvantages of social network
Social networking sites such as  MySpace, Face book , and twitter offer even less security and protection because they are open to anyone
Students often post detailed and specific information on Facebook e.g. phone numbers, addresses
You can be easily stalked by strangers

30. Impact on the society with social networking
Students are getting in trouble with University administrators for inappropriate information or pictures on their social networking profiles that are violations of school policy
Students are being turned down by employers for jobs, internships and even interviews because of the information employers are finding out about students on their social networking accounts
Employers take the images that students are portraying on social networking sites very seriously as a reflection of personal character

31. Online banking

32. Advantages of Online Banking
Convenience
Online banking sites never close
They are available 24 hours a day and seven days a week
Ubiquity
If you're out of town or even out of the country and you have no money, you can log on immediately to your online bank and get money
Efficiency
You can access and manage all of your bank accounts, including
IRAs, CDs, even securities, from one secure site.

33. Disadvantage of Online Banking
Start-up
If you want to register for your bank's online
program, you will need a ID and sign a form at
a bank branch
Learning
Banking sites can be difficult to navigate at first
You need to take your team and read everything

34. Impact on online banking
Since many people use online banking, many people can hack into their accounts and steal money. This increased the number of crime.

35. Facebook Today there are more than 800 million active users
50% of active users log on to Facebook every day
People spend over 700 billion minutes per month on Facebook
There are more than 250 million active users accessing Facebook through their mobile devices
People that use Facebook on their mobile devices are twice as active on Facebook than non-mobile users

36. Facebook-Popilarity
In this graph you can see that in many people used Facebook but in the number of facebook users increased rapidly and in 2011 Facebook had 800 million users

37. Facebook-Users by age
In this graph you can see that older people with the age of only spent 5% in Facebook
While people with the age of spent 26% in Facebook

38. Total active users in Facebook
Date
Users(in millions)
August 26, 2008
100
April 8, 2009
200
September 15, 2009
300
February 5, 2010
400
July 21, 2010
500
January 5, 2011
600
May 30, 2011
700
September 22, 2011
800
As you can see in the graph and table the number of users increased by 100 every year

39. Advantages of Facebook
Its free and it's one of the best medium for communication
Gives you the chance communicate with any of our old friends
You can share what's happening around your daily life
Has good privacy setting which gives you the option to customize according to your wish
Online games are really popular and addicting
Has thousands of application, quiz and games
The “like button” is connecting their user to every other website

40. Disadvantages of Facebook
You get addicted - kills your valuable time
Fake profiles – people pretend to be someone they are not
There are many groups that are being created to abuse or violate other religion , personalities , nation etc
Often brings bad effects on students results- Students who are Facebook addicted fail their exam or have bad results
Facebook chat doesn't work properly. User often have trouble while chatting in Facebook

41. Bibliography
Facebook