1. Unit 5 Introduction to Networking
ICT II
Unit 5 Introduction to Networking

2. What is a network?
Group of computers connected together in such a way as to allow resources to be shared.
What do you know about networks?
Describe a network – what are components?
Compare a stand-alone PC to a network PC.

3. What does a network include?
Two or more computers that are linked together in order to:
share resources (such as printers and CD-ROMs)
exchange files
allow electronic communication.

4. How are networks connected?
Cables
Telephone lines
Fiber Optic (visible light)
Radio waves (WiFi - Wireless local area network that uses radio signals to transmit data)
Satellites (GPS)

5. Components of a Network
Cables
Modem
A device that allows computers to communicate over telephone lines
Network Interface cards
A card installed in a computer that allows you to connect to a network (can be Ethernet, telephone, or wireless)

6. Components of a Network
Switches
like a tiny telephone company that lets pairs of devices make direct connections.
Hubs
simply connects all of the devices on its ports together

7. Components of a Network
Router
a device that transfers data from one network to another in an intelligent way
Server
computer or device on a network that manages network resource

8. Types of Networks
LAN
MAN
WAN

9. LAN Local Area Network Confined to a relatively small area
Generally limited to the same building
Computers can be no more than a mile apart

10. Components of LAN
A file server – stores all of the software that controls the network, as well as the software that can be shared by the computers attached to the network
A workstation – computer connected to the file server
Cables – used to connect the network interface cards in each computer

11. LAN

12. MAN Metropolitan (Metro) Area Network
Covers small geographical areas, such as cities
Often used by libraries and government agencies to connect to citizens and private business industries

13. MAN

14. WAN Wide Area Network Connects larger geographical areas
Examples include: SPSD and Internet

15. WAN

16. Our LAN at BJHS All computer labs
All of the individual computers in other classrooms
Each ICT labs is a LAN segments
Each lab is connected together in a smaller network.
Connected by Ethernet cables.
Plugged into the network card in each computer

17. Our LAN at BJHS
Each lab has a switch that control the data that flows in and out
The cable from each switch plugs in to a port on another switch. That switch is connected to the ICT server which is located in SPHS.
The ICT server is connected to a router that gives us access to the Internet as well as other applications.