This is the series of network fundamental course for IT learners. The student should follow the

1. Network Fundamentals

2. A collection of devices that are
connected in various ways in order to
communicate and share resources
What is a Network

3. Example of a network

4. Local Area Network (LAN)
Network Interface Card (NIC)
Ethernet Cable
(RJ45)

5. Local Area Network (LAN)
Pc 1
Pc 2 Pc 3 Pc 4
Pc 5
Printer

6. Wide Area Network (WAN)
Colombo office
Jaffna office
Colombo
ISP
ISP: Internet service provider
Jaffna
ISP

7. Transmission modes in Networking
01.Simplex
02.Half Duplex
03.Full Duplex

8. Simplex
Communication in one direction only
Device
A
Device
B
Eg: Television,Radio

9. Half Duplex
Communication in both direction
but One at a time
Device
A
Device
B
Eg: Walkie talkie,Fax

10. Full Duplex
Communication at both direction at
the same time
Device
A
Device
B
Eg: Mobile