Network and Types of Networks

This Slide includes:
1. Meaning of Network
2. Importance Of Network
3. Types of Network
3.1. On the basis of Topology.
3.1.1. Structured Topology
3.1.2. Unstructured Topology
3.2. On the basis of Architecture.
3.2.1. Peer-To-Peer Network.
3.2.2. Server-based Network.
3.3. On the basis of Geographical Area
3.3.1. Local Area Network (LAN).
3.3.2. Wide Area Network (WAN).
3.3.3. Metropolitan Area Network (MAN).
3.3.4. Virtual Private Network (VPN).
3.3.5. Storage Area Network (SAN).
3.3.6. Value Added Network (VAN).

- Uttar Tamang

1. 1 Network And It’s types Uttar Tamang

2. NETWORK A group of interconnected (via cable and/or wireless) computers and peripherals that is capable of sharing software and hardware resources between many users. Telecommunication network is a electronic system of links and switches, and the controls that govern their operation, that allows for data transfer and exchange among multiple users. Example: The Internet is a global network of networks. 2

3. IMPORTANCE OF NETWORK Used to share hardware, programs and database in organization. Different types of audio, video conferencing is possible. It helps for making connections and maintaining relationship. Cost reduction by sharing hardware and software resources. It supports linkage for competitive advantage. High reliability by having multiple sources of supply. 3

4. Types of Network On the basis of Topology . On the basis of Architecture . On the basis of Geographical Area 4

5. On the basis of Topology It is a logical model. It describes how computers are connected. It describes how networks are structured or configured. It refers to the way the computers or workstations in the network are linked. 5

6. Structured: Unstructured: Ring Topology. Bus Topology. Star Topology. Hierarchical Topology. Hybrid Topology. Mesh Topology. Mobile Adhoc Network [MANET] Types Of Networking By Topology 6

7. Structured A. Ring Topology Computers and computer devices are placed in a ring. Each station is attached nearby stations on a point –to-point basis. Data are transmitted in one direction only. It circulates data along the ring in either clockwise or anti clockwise direction. 7

8. Advantages: Disadvantages: No loss in signal quality. Easy to install. Easy to troubleshoot. No need to terminate cable. Expensive topology. Single failed station can bring down the whole network. It uses more cable than the bus topology. Limitation in size of ring and number of devices. Continue…. 8

9. B. Bus Topology Computers and computer devices are on single line. Direct communication to all devices on the bus. There is no central node. Failure of one station does not affect others. 9

10. Advantages: Disadvantages: Easy to implement and extend. Well suited for temporary networks. Least cheapest topology. Failure of one station does not affect other. Difficult to troubleshoot. Limited cable length and number of stations. A cable break can disable the entire network. Maintenance cost may be higher in the long run. Continue… 10

11. C. Star Topology Computers and computer devices are placed in a ring. Each station is attached nearby stations on a point –to-point basis. Data are transmitted in one direction only. It circulates data along the ring in either clockwise or anti clockwise direction. 11

12. Advantages: Disadvantages: Quite inexpensive. Easy to troubleshoot. If there is a computer failure it only affect one computer. Easy to reconfigure. Data transmission rate are low. It requires lot of cable. Difficult to install. Continue… 12

13. D. Hierarchical Topology It shows like a tree structured. It pass message along the branches of hierarchy. Each node in a hierarchy level has point-to-point link with each adjacent node on its below level. Entire system can be crippled by any damages of primary node. 13

14. Advantages: Disadvantages: Information flow in hierarchical order. Easy to install. Requires a lot of cable. Difficult to troubleshoot. Continue… 14

15. E. Hybrid Topology It is a mix of different kinds of structured topologies. It combines ta features or characteristics from more than one of network topology. Functioning network is really the combination of several smaller networks . 15

16. Advantages: Disadvantages: Useful for different system. Effective for room size and shape. Easy to understand. It requires a more cable. Complex in nature. Continue… 16

17. F. Mesh Topology All computers are interconnected with each other. It is known as entirely connected network. It is reliable in nature. More cables are used. Linking cost depends on the number of nodes. 17

18. Advantages: Disadvantages: Each connection can carry its own data load. High data transmission rate. Provide security and privacy. Difficult in installation. It is costlier. Bulk wiring. Continue… 18

19. Unstructured A. Mobile Adhoc Network Unstructured network topology. Network does not have specify topology. Structure is changing dynamically. Sending and receiving message are difficult problems. 19

20. Advantages: Disadvantages: Easy implementation. Speed of deployment. Decrease dependence on infrastructure. Lack of centralized entity. Unpredictable Hidden/exposed station problem. Power limitation. Continue… 20

21. On the basis of Architecture Peer-To-Peer Network . Server-based Network. 21

22. Peer-To-Peer Network It take both client and server role. No centralized control over shared resources. Resources are shared with any other computers on the same network. All computers are equally access. No additional hardware and software are needed. 22

23. Advantages: Disadvantages: Easy to install. Individual users control their own-shared resources. Inexpensive to purchase and operate. No additional hardware and software is needed. They are shared resources. No centralized control access to data. Not suitable for more than 10 users. Continue… 23

24. B. Server-based Network It provide centralized control over the network resources. Computers used for server usually incorporate faster CPUs, more memory, larger disk devices etc. Servers are dedicated to handle network requests from their clients. Single password for network login delivers access to all. 24

25. Advantages: Disadvantages: Efficient access to network resources. Suitable for more than 10 users. Information are centrally controlled. Server failure leads to whole network failure. It is complex in nature. Dedicated hardware (server) and special software add to the cost. Continue… 25

26. On the basis of Geographical Area Local Area Network (LAN). Wide Area Network (WAN). Metropolitan Area Network(MAN). Virtual Private Network (VPN). Storage Area Network (SAN). Value Added Network (VAN). 26

27. Local Area Network (LAN) Connects computers systems and devices in the same geographic area. Links the devices in a single office building. It contains size, transmission technology, topology. High degree of interconnection between computers. Easy physical connection of computers. High data transmission rate. 27

28. Advantages: Disadvantages: High reliable network. Easy physical connection. Inexpensive medium of data transmission. High rate of data transmission. Entire network system breaks down if communication line fails. User identification is poor. Continue… 28

29. Wide Area Network (WAN) It describe a network spanning a regional, national or global area. The distance between computers connected to WAN is larger. Its transmission medium are telephone lines, microwaves and satellite. Internet is the best example of WAN. 29

30. Advantages: Disadvantages: It covers large area. All resources can be collected with the help of WAN. E-commerce is possible with the help of WAN. It is costly. Security problem. Signally affected to health. Continue… 30

31. Metropolitan Area Network (MAN) It covers larger area than LAN. Effective for large organization. It may be a means of connecting number of LANs into a larger network. It is designed to extend over an entire city. It may be a single network such as a cable television network. 31

32. Advantages: Disadvantages: Increased efficiency of handling data. Offered centralized management of data. Speed of data transferred. It coverage large area than LAN. More cable required. Difficult to install. Difficult to secure from hackers. Continue… 32

33. Virtual Private Network (VAN) It is used for security purpose. It is used to established secure intra-net and extra-net. It uses the internet as its main backbone network for security. It also provide a network infrastructure for combining voice and data network. 33

34. Advantages: Disadvantages: Secure connection between sites. Access to restricted contents. Reduce cost. Maintenance problem. Break of security cause large issue. Difficult to manage server during unexpected traffic. Continue… 34

35. Storage Area Network (SAN) Shared large amount of data in a centralized basis. It manage large amount of data in hard disk or storage device. It is useful for large organization . High reliable and fast access. 35

36. Advantages: Disadvantages: High reliable. Easy and fast retrials. Better disk utilization. Reduce backup time. It is costly. Complex in nature. Difficult to manage. Continue… 36

37. Value Added Network (VAN) It is a public network utility. It provide both network access and additional services to its users. Facebook, America Online is the best example of VAN. 37

38. Advantages: Disadvantages: Faster transaction processing. Better communication. Safety and reliability. Cost and installation. Security problem. Continue… 38

39. 39 Thank You