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# Topology

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will help people 2 understand the concept of the topology in computer networks

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### Topology

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2. 2. Computer Networks• A computer network is basically a collection of computers which are connected to each other. It is an interconnection of computers for the purposes of sharing information and resources.• A popular example of a computer network is the internet, which allows millions of users to share information. 2
3. 3. An example of a networkRouter Hub Bridge Cable Node Hub Internet 3
4. 4. TOPOLOGYThere are certain rules or methods so as to connect the computers to each other.Hence, here the word TOPOLOGY exists.A Topology is a map of computer which allows how to connect computers with each other.It is a physical connection of computers within a particular network.It defines the nodes and cables that together makes up a network. 4
5. 5. Types of TopologyGenerally, there are 3 types of topologies. They are :- Bus Topology Star Topology Ring TopologyNow besides these 3 topologies, there is one more topology named as Mesh Topology which is the combination of star and ring topology. It comes under Hybrid Networks. 5
6. 6. Network Topologies1. Bus Topology– In this network, all computers are connected through single cable and all the nodes or computers do transmission and reception of messages or data using single cable. 6
7. 7. Bus TopologyAdvantages DisadvantagesSuch networks is easy to The failure of the cable build and install. brings the whole networkIt is inexpensive and easy to shut down. to use it. At a time, only 1 node canIf one node fails, others are transmit signals due to not affected. which the communication becomes slow. 7
8. 8. 2. Ring Topology – The ring network is like a bus network, but the “end” of the network is connected to the first node. – Nodes in the network use tokens to communicate with each other. 8
9. 9. Ring TopologyAdvantages DisadvantagesRing networks are Failure of one computer moderately easy to install. affects the whole network.Cable faults are easily Adding or removing located making computers is difficult to troubleshooting easier. achieve. 9
10. 10. 3. Star Topology  Each node is connected to a device in the center of the network called a hub.  The hub simply passes the signal arriving from any node to the other nodes in the network.  The hub does not route the data. Hub 10
11. 11. Star TopologyAdvantages Disadvantages Failure of the central hubThe failure of a single causes the whole network computer or cable does not to shut down. bring down the entire network. It is slightly expensive than Bus Topology. 11
12. 12. 4. Mesh Topology – Mesh topology is the combination of star and ring topologies. 12
13. 13. Mesh TopologyAdvantages DisadvantagesIt is more reliable than It is very expensive. compared to other It includes lots of nodes topologies. and cables for connections.Data can be transmitted Due to this, adding or easily even if there is a removing of nodes is heavy traffic within the difficult to attain. network. 13
14. 14. RecommendationsFor single or a small group of users, it is suggested touse a bus or ring topology as it is cheap and easy toinstall and use.For a company or a big organization, it is better to fixmesh or star topology. Although it is an expensivenetwork but, it will yield good and satisfyingperformance. 14
15. 15. ConclusionHence, we can say that a topology is geometricrepresentation of the relationship of all the linkingdevices to one another. Despite having some meritsand demerits, these various topologies can be utilizedaccording to the user’s needs and desires. 15
16. 16. AcknowledgementWebsite - www.wikipedia.comData Communications And Networking - byBehrouz A. Forouzan 16
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