B.sc i agri u 5 data communication and network

B.sc i agri u 5 data communication and network

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  Course: B.Sc Subject: ComputationsSkills Unit-5.1 Data Communication and Networking
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  Definition of Network Topology Typesof Network Topology Differentiation Between the Types of Network Topology CONTENT
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  What is aTopology ? The physical topology of a network refers to the configuration of cables, computers and other peripherals. DEFINITION
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  Bus network. Ring network. Starnetwork. TYPES OF NETWORK TOPOLOGY
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  All computers anddevices connected to central cable or bus. Consists of a main run of cable with a terminator at each end. Popular on LANs because they are inexpensive and easy to install. BUS TOPOLOGY
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  BUS TOPOLOGY
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  Cable forms closedring or loop, with all computers and devices arranged along ring. Data travels from device to device around entire ring, in one direction. Primarily is used for LANs, but also is used in WANs. RING TOPOLOGY
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  RING TOPOLOGY
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  All devices connectto a central device, called hub. All data transferred from one computer to another passes through hub. STAR TOPOLOGY
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  STAR TOPOLOGY
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  WHAT IS DIFFERENTIATION BETWEENTHE THREE OF NETWORK TOPOLOGY? SEARCH IN THE INTERNET DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY
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  ADVANTAGE DISADVANTAGE 1) Easyto connect computer or peripheral to a linear bus. 1) Entire network shuts down if there is a break in the main cable. 2) Requires less cable length than a star topology. 2) Terminators are required at both ends of the backbone cable. 3) Difficult to identify the problem if the entire network shuts down. BUSBUS DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY
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  ADVANTAGE DISADVANTAGE 1) Datais quickly transferred. 1) Data packets must pass through every computer between the sender and recipient therefore, this makes it slower. 2) The transmission of data is relatively simple as packets travel in one direction only. 2) If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. 3) It is difficult to troubleshoot the ring. RINGRING DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY
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  ADVANTAGE DISADVANTAGE 1) Easyto install and wire. 1) Requires more cable length than a linear topology. 2) Security can be implemented in the hub/switch. 2) If the hub or concentrator fails, nodes attached are disabled. 3) Easy to detect faults and to remove parts. 3) More expensive than linear bus topologies because of the cost of the concentrators. STARSTAR DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY
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  DEFINITION •All computers and devices connectedto central cable DEFINITION •All computers and devices connected to central cable BUS TOPOLOGY ADVANTAGE •Easy to connect a computer or peripheral to a linear bus. ADVANTAGE •Easy to connect a computer or peripheral to a linear bus. •Requires less cable length than a star topology. •Requires less cable length than a star topology. DISADVANTAGE •Entire network shuts down if there is a break in the main cable. DISADVANTAGE •Entire network shuts down if there is a break in the main cable. •Terminators are required at both ends of the backbone cable. •Terminators are required at both ends of the backbone cable. •Difficult to identify the problem if the entire network shuts down. •Difficult to identify the problem if the entire network shuts down. SUMMARY
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  RING TOPOLOGY DEFINITION •Cable forms closedring or loop, with all computers and devices arranged along ring. DEFINITION •Cable forms closed ring or loop, with all computers and devices arranged along ring. ADVANTAGE •Data is quickly transferred without a ‘bottle neck’. ADVANTAGE •Data is quickly transferred without a ‘bottle neck’. •The transmission of data is relatively simple as packets travel in one direction only. •The transmission of data is relatively simple as packets travel in one direction only. DISADVANTAGE •Data packets must pass through every computer between the sender and recipient therefore, this makes it slower. DISADVANTAGE •Data packets must pass through every computer between the sender and recipient therefore, this makes it slower. •If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. •If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. •It is difficult to troubleshoot the ring. •It is difficult to troubleshoot the ring. SUMMARY
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  DEFINITION •All devices connect toa central device, called hub. DEFINITION •All devices connect to a central device, called hub. ADVANTAGE •Easy to install and wire. ADVANTAGE •Easy to install and wire. •Security can be implemented in the hub/switch. •Security can be implemented in the hub/switch. DISADVANTAGE •Requires more cable length than a linear topology. DISADVANTAGE •Requires more cable length than a linear topology. If the hub or concentrator fails, nodes attached are disabled. If the hub or concentrator fails, nodes attached are disabled. More expensive than linear bus topologies because of the cost of the concentrators. More expensive than linear bus topologies because of the cost of the concentrators. STAR TOPOLOGY •Easy to detect faults and to remove parts •Easy to detect faults and to remove parts SUMMARY
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  Reference 1. INFORMATION TECHNOLOGYAPPLICATIONS FOR BUSINESS: 2. Dr. S.Sudalaimuthu and R. Hariharan.: Himalaya publishing house. 3. INFORMATION TECHNOLOGY FOR MANAGEMENT: B.Muthukumaran, Oxford university press Computer Fundamentals, Goyal, Anita 1st Edition, Pearson Education. 4. Introduction to Information Technology by Leon and Leon, Vikas Publishing House. 5. Information Systems Today, 2e by Leonard Jessup, Joseph Valacich, PHI 6. Management Information Systems by Laudan & Laudan, Pearson Publications Computer Network, by Andrew Tannebaum Pearson. 7. Data Communication & Networking, by Forouzen TMH. 8 Data Communication & Computer Networks, by Brijindra Singh PHI. 9. Data & Computer Communication, by Williams Stallings PHI.