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Computer network(Computer Network Topology).pdf
- 1. NETWORK TOPOLOGY Authored by Subhajit Sardar Btech. In Electrical Engineering
- 2. What is Network Topology? A computer network is a collection of two or more computers which are connected together to share information and resources Types Of Topology ❖ Based on geographical area covered ▪ Local Area Nework (LAN) ▪ Metropolitan Area Network (MAN) ▪ Wide Area Network(WAN) ❖ Based on Architecture ▪ Bus Topology ▪ Star Topology ▪ Ring Topology ▪ Tree Topology ▪ Mesh Topology ▪ Hybrid Topology
- 3. Bus Topology A Bus Topology consists of a single cable –called a Bus – connecting all nodes on a network without intervening connectivity devices. Advantages of Bus Topology • Works well for small networks. • Relatively inexpensive to implement. • Easy to expand joining two cables together. • Used in small network. Disadvantages of Bus Topology • Management costs can be high. • Cables fails then whole network fails. • Cables has a limited length.
- 4. Star Topology A Star network is designed with each node (file server, workstation,Peripheral) connected directly to a central network hub or server. Advantages of Star Topology • Good option for modern networks. • Low startup costs. • Easy to manage. • Offers opportunites for expansion. • Most popular topology in use wide variety of equipment available. Disadvantages of Star Topology • Hub is a single point of failure. • Requires more cable than the bus. • Cost of installation is high.
- 5. Ring Topology A ring network is one where all workstations and other devices are connected in a continuous loop. There is no central server. Advantages of Ring Topology • Easier to manage; easier to locate a defective node or cable problem. • Well- suited for transmitting signals over long distances on a LAN. • Handles high-volume network traffic. Disadvantages of Ring Topology • Expensive. • Requires more cable and network equipment at the start. • Not used as widely as bus topology. _Fewer equipment options. _Fewer options for expansion to high-speed communication.
- 6. Tree Topology It has a root node and all other nodes are connected to it forming a hierarchy. It is also called Hierarchical Topology. Advantages of Tree Topology • Extension of Bus and Star Topology. • Expansion of nodes is possible and easy. • Easily managed and maintained. Disadvantages of Tree Topology • Heavily cabled. • Costly. • If more nodes are added maintenance is difficult. • Central hub fails,network fails.
- 7. Mesh Topology It is a point–to-point connection to other nodes or devices. Traffic is carried only between two devices or nodes to which it is connected. Mesh has n(n- 2)/2 physical channels to link hn devices. Advantages of Mesh Topology • Each connection can carry its own data load. • Fault is diagnosed easily. • Provide security and privacy. Disadvantages of Mesh Topology • Installation and configuration is difficult. • Cabling cost is more. • Bulk wiring is required.
- 8. Hybrid Topology Its is the mixture of two or more topologies.Therefore it is called Hybrid Topology. A Hybrid Topology combines characteristics of linear bus and Star and/or Ring Topologies. Advantages of Hybrid Topology • Reliable as error detecting and trouble shooting is easy. • Effective. • Scalable as size can be increased easily. • Flexible. Disadvantages of Hybrid Topology • Complex in design. • Costly.
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