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Communications, Networks and Internet. Communication. This growth in communications technology has revolutionized the way the businesses work and keep in touch with staff and customers. Method of communication. Telephone Internet- Facebook , Twitter,Tumblr,Gmail Skype Flair MSN MySpace

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  • This growth in communications technology has revolutionized the way the businesses work and keep in touch with staff and customers
method of communication
Method of communication
  • Telephone
  • Internet- Facebook, Twitter,Tumblr,Gmail
  • Skype
  • Flair
  • MSN
  • MySpace
  • Letter
  • Sonar
  • Sounds
  • Facial expression
  • ICQ
  • Text message
  • BBM
  • Mix it
  • Speech
  • 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


local area network lan
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


  • 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
types of lan
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


  • Is limited to about 10 machines
  • Found in small businesses and departments
cabled lan vs wireless lan
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
  • Usesses a wireless link to connect to the network
  • Slower transmission speed
  • Has 3 sets of componets:
  • Wireless points
  • Wireless interface cards
  • Routers
wide area network wan
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
difference between stand alone and workstation
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.
how can you tell whether a computer is networked to other computers
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
a file server
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
print server
Print server
  • Coordinates printing on the network
bluetooth vs wi fi
Bluetooth vs. wi-fi
  • 10 meters
  • Mobile phones, mouse, keyboards
  • Simple to use
  • Low cost
  • Developed in 1994
  • Notebook, PC, desktop
  • 100 meters
  • More complex
  • High cost
  • Developed in 1991