1. COMPUTER NETWORK & COMMUNICATIONS LEARNING AREA 3 (LA 3) Norhasimah Bt Mohamed – Head of ICT Panel, SMK Sungai Pusu, Gombak Sel. 03092007

3. COMPUTER NETWORK What is… ?

5. COMMUNICATIONS What is… ?

10. TYPES OF NETWORKS LOCAL AREA NETWORK METROPOLITAN AREA NETWORK WIDE AREA NETWORK

14. Comparison of LAN, MAN, WAN

16. NETWORK ARCHITECTURE

20. Differences

22. NETWORK ARCHITECTURE Bus Topology Ring Topology Star Topology

26. Differences limited limited many Number of nodes when extending network average difficult easy Ease of adding or removing nodes depends on the host. It is easier to repair the problematic host. However, if the nodes fail, then each node has to be searched depends on backbone. If there is a backbone, troubleshooting is difficult. If there is no backbone, the focus is on the two nodes not communicating difficult. Need to search for the problematic node one by one Ease of troubleshooting network can still run network will fail network can still run Node failure network will fail network will fail network can still run Host failure no yes It has no connection between the nodes. Connection between nodes yes depends on network needs depends on network needs Host existence there is a central host and all nodes connect to it all computers and other devices are connected in a circle there is a single central cable (backbone) and all computers and other devices connect to it Structure Star Topology Ring Topology Bus Topology