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Network Topology and Types of Network Topology

Updated on June 19, 2013


Two or more computers connected together through communication media form a computer network. The arrangement of computers in a network is called Network Topology. It is a physical layout of connected computer.

Following are network topologies.

1). Bus topology.

2). Star topology.

3). Ring topology.

4). Mesh topology


STRUCTURE of Bus Topology:

In the bus topology, the computers are connected through a common communication media. A special type of central wire is used as communication media. This central wire is called Bus. The computer are attached through the bus the ends of the bus are closed with the terminator .The terminators are used to absorb signals. Bus topology use coaxial cables sections are connected to the B. N. C connectors. B.N.C connectors are often use to connect the computer through the main cable. These connectors can connect through two section of cable with the bus extending in both directions. The end device on the bus have the terminals on one connectors of T


The computers that send data also attach address of the destination computer with the data. All computers connected to the bus receive the data but only that computer accept it whose address matches the address attached with data.

In this topology only one computer at a time can send a data therefore the speed of network reduces as the number of computers attached to the bus increases.

ADVANTAGES of Bus Topology:

  • Easy to install and configure
  • Inexpensive
  • Easily extended

Disadvantages of Bus Topology :

  • Performance decreases
  • Weak signals
  • Difficult troubleshooting

Bus Topology
Bus Topology



The star topology uses a separate cable for each work station as shown in fig.The cable connects the work station to a central device typically a HUB. The configuration provides a more reliable network that is easily expended. With star there is no central point of failure in the cable .if there is a problem with the cable only the station connected to that cable is an effected .to add more work stations simply connect another HUB



Each computer in a star network communicates with the central hub that resents the messages either to all computers (in a broadcast network) are only to destination computer (in a switch network).

Star network maybe designed to operate in a polled mode where each user is asked in turn .if it has any information to transmit and in case, if it has, the communication controller will either give full attention to that device until it has no more information to send or it will allow the device to send part of its information ,give another device a chance and then return back to original device.


  • Easily expended and modified
  • Easy to troubleshoot
  • Multiple cable types supported by hub


  • If hub fails then entire network will fail
  • Require more cables
  • May require a device to rebroadcast signals across the network



In ring topology each computer is connected to the next computer and the last computer is connected to the first computer. Thus a ring of computers is formed as shown in figure below.


Every computer is connected to the next computer in the ring and each transmits what it receives from the previous computer. The messages flow around the ring in one direction.

Some ring network do ring token passing. A short message called token (memory area)is passed around a ring until a computer wishes to send information to other computers. That computer modifies token, adds an electronic address and data and send it around the ring. Each computer in sequence receives the token and next computer until either the electronic address matches the address of a computer

Or the token return to its origin .The receiving computer returns a message to the sender indicating that message has been received.


a. It provides an orderly network in which every device has access to the token and can transmit.

b. It performs well under a heavy load.


a. Failure of one computer can effect the whole network .

b. Difficult to troubleshoot.

c. Change mode with adding or removing a device effect the entire network.

Ring Topology
Ring Topology



A mesh network or mesh topology uses separate cable to connect each device to every other device on the network, providing a straight communication path as shown in the figure below.


For sending messages, check the cable connected into two devices. A message is send directly from sender to receiver because each one has individual and separate connection.


a. Enhance for error tolerance provided by redundant links.

b. Easy to troubleshoot.


a. Difficult to install and maintain.

b. Expensive.



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    • profile image

      tanzeel 3 years ago

      very good

      and easy guide

    • profile image

      zaidan 3 years ago

      can you add linear topology

    • profile image

      Lydia 3 years ago

      SHORT NOTES......... THANKS

    • profile image

      nhle 3 years ago

      wow.. its useful but i wanna when it was accessed

    • profile image

      solomon, 3 years ago

      good notes, thanks

    • profile image

      Francis 3 years ago

      ur simplicity+content has helped me a lot

    • profile image

      tanu 3 years ago

      it is so simple $ understandig discripstion.......

    • profile image

      bete 4 years ago

      best ofbest

    • profile image

      haya 4 years ago

      its so easy for students

    • profile image

      umair 4 years ago

      Thank u

    • profile image

      deepak 4 years ago

      So simple so wanna thank to goole

    • profile image

      jai 4 years ago

      it semis to be study more...

    • profile image

      azad 4 years ago

      it is easy good topology

    • profile image

      vishakha kinikar 4 years ago

      Thank you.

      Easy and goooood guide

    • profile image

      hari 4 years ago

      what is inserted ring topology?

    • profile image

      anantpatel 4 years ago

      it's helpful but where is other types of topology

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      Haidar 4 years ago

      Thank you for this information .

    • profile image

      Futamarka 4 years ago

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      hari 4 years ago

      it is nice it helps to students............

    • profile image

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      bams 5 years ago

      plz add hybrid topology and compare their performances

    • profile image

      sattar jamali 5 years ago

      very simple and good guide .........................

      GOD will be success on your missoin.....

    • profile image

      hh nmj 5 years ago

      yes if this can u t

    • profile image

      Raman 5 years ago

      Plz add tree topology and comparision between all of these with key points

    • profile image

      purva 5 years ago

      its really helpful

    • profile image

      deepu 5 years ago

      if the details and types are more then it will be nice

    • profile image

      hanvashe 5 years ago

      I thought also that there is a tree topology. .

    • profile image

      gulgi 5 years ago

      THANK U HUBPAGE to make me aware so well about these tapology i am IT student and it help me a lot in my exam THANKS once again

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      manish kumar 5 years ago

      is this posible that on the basic of more type tropology.

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      Anish 5 years ago

      It Doesn't have Tree and Graph Topology

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      praveen 5 years ago

      really it wil help to everyone a lot... Thanks to provide

    • profile image

      david stephen 5 years ago

      it is nice it help students

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      Bello Rashidat Modupeola 5 years ago

      its really perfect for student. pls try and put this into consideration,come up with online tutor because i know you are going to perform excellently and it going to help a lot of people most especially students.

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      ayushi&anita singh choudhary 5 years ago

      its very good for students

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      stheni 5 years ago

      please load more information about data communication and networking because i've find an interesting information about the topology and their funtion. it was very interesting straight to the point i've find what i need thaks a lot

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      Stentonya 5 years ago

      What are encoding techniques

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      beverly 7 years ago

      there is no tree topology