IT

1. Computer Networks

2. What is network ?
•A collection of devices that can communicate together
•The network achieves this by providing a set protocols

3. Understanding the pieces of a network

4. HUBs and SWITCHes

5. Application that use the network

7. •LAN
•MAN
•WAN

8. A. Local Area Network (LAN)

9. B. Metropolitan area network (MAN)

10. C. Wide area network (WAN)

11. • Public Networks
• Private networks

12.  Public networks, accessible to the average user, but
may require registration. Like Internet.
 Private networks are for the private use of the
organizations to which they belong. Like banks,
hospitals, etc.

13. •Point-to-point
•Broadcast
o unicast transmission network
o broadcast transmission network
o multicast transmission network

14. Point-to-point

15. Unicast transmission

16. Broadcast transmission

17. Multicast transmission

18. •circuit switching
•packet switching

19. circuit switching and packet switching
 In circuit switching, a dedicated communication path
is allocated between A and B.
 In packet switching, data is divided into packets which
are sent from A to B.

20. •Bus
•Ring
•Star
•Extended star
•Hierarchical
•Mesh

21. Bus Topology
 connects all the devices using a single cable.

22. Star and Extended-Star Topologies
 The star topology is made up of a central connection
point where all the cabling segments meet

23. Ring Topology
 Hosts are connected in the form of a ring or circle.
 The computers act as signal boosters or repeaters.

24. Hierarchical Topology
 It uses a trunk node from which it branches to other
nodes.

25. Full-Mesh and Partial-Mesh Topologies
 The full-mesh topology connects all devices to each
other for redundancy.
 In a partial-mesh topology, at least one device
maintains multiple connections to others.