Networks- Hardware and commercial usage

Networks- Hardware and commercial usage

1. Consists of...

   • Hardware
     • Routers
     • Switches
     • Hubs
   • Data transfer - wires;
     • Fibre optic
     • Metal

2. Data transfer media

   • Data can be transferred by...
     • Metal wire
     • Fibre optic cable
     • Wireless

3. Communication devices

   • Network interface card
     • Prepares data for sending over network
     • Sends data
     • Controls flow of data
   • A hub
     • joins computers in a network
     • Allows connection of cables
     • Shares files and internet access
   • Router
     • Wired or wireless
     • join several networks together
     • connect several computers to the internet
   • Switch
     • More intelligent than a hub
     • look at data to decide where to go
     • Reduces number of packets of data = speeds up

4. Consists of...

   • Network operating systems
     • Designed specifically for networks
   • Network management software
     • keep track of software
     • keeps software up to date
     • Installs security
     • Helping manage help desk

5. POS- Point of sale

   • Pay for goods
   • Till
   • Automatically record stock levels

6. ·

   • Bar code reader
   • keyboard
   • Touch screen
   • Swipe cards
   • Chip and pin readers

7. POS- networks

   • Payment systems
     • Pay via debit card
   • Loyalty systems
     • Given points on how much they send
   • Automatic stock control
     • What's sold gets taken off stock list

8. Advantages

   • Can share hardware
     • Share one printer
   • Software installed in one place
     • Not needed on every system
     • Saves money
   • Improved security
     • Back ups
   • Cost
     • Schools save money

9. Disadvantages

   • Network manager needed
     • Expensive
   • Security problems
     • Virus
   • Breakdown problems
     • can effect all computers
   • Expensive
     • Cables
     • Servers
     • Installation

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