presentation on type of toplogy and network


Published on

Published in: Business, Technology
  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

presentation on type of toplogy and network

  1. 1. Presentation on types ofNetworks and its TopologiesPresented ByPuja Agrawal
  2. 2. What is NetworkA network consists of 2 or more computersconnected together, and they cancommunicate and share resources (e.g.information)
  3. 3. Types of Network LAN WAN MAN Peer- to - Peer
  4. 4. LAN and WANLocal Area Network (LAN) Small network, short distance A room, a floor, a building Limited by no. of computers and distance covered Usually one kind of technology throughout the LAN Serve a department within an organization Examples:• Network inside the Student Computer Room• Network inside your home
  5. 5.  Wide Area Network (WAN)A network that uses long-range telecommunicationlinks to connect 2 or more LANs/computers housedin different places far apart.Towns, states, countriesExamples:• Network of our Campus• InternetWAN
  6. 6. Example of WAN: Broadband CableNetworkCable TV services have been extensively developed inmost modern citiesCable TV companies try to make use of their coaxialcable installed (that are supposed to carry TV signals)to deliver broadband data servicesMany cable network wiring has been replaced withhybrid fiber-coax (HFC) ― i.e. use of fiber-optic cableto connect to the subscribers’ buildings, and then theoriginal coaxial cable to connect to each household
  7. 7. Example WAN technologies:• ISDN – Integrated Service Digital Network• Basic rate: 192 Kbps Primary rate: 1.544Mbps• T-Carriers ― basically digital phone lines• T1: 1.544Mbps T3: 28T1• Frame relay• Each link offers 1.544Mbps or even higher• ATM – Asynchronous Transfer Mode• Support B-ISDN: 155Mbps or 622Mbps or higher• SONET – Synchronous Optical Network• Basic rate OC1: 51.84Mbps• Support OC12 and up to OC192 (9953.28Mbps) or even higher in thefuture
  8. 8. Metropolitan-area network (MAN)The communication infrastructures that havebeen developed in and around large cities
  9. 9. Peer-to-Peer Networks• Peer-to-peer network is also called workgroup• No hierarchy among computers  all are equal• No administrator responsible for the networkPeer-to-peer
  10. 10. Peer-to-Peer NetworksAdvantages of peer-to-peer networks:• Low cost• Simple to configure• User has full accessibility of the computerDisadvantages of peer-to-peer networks:• May have duplication in resources• Difficult to uphold security policy• Difficult to handle uneven loadingWhere peer-to-peer network is appropriate:• 10 or less users• No specialized services required• Security is not an issue• Only limited growth in the foreseeable future
  11. 11. Topology ― 4 basic types• How so many computers are connected together?Bus Topology Ring TopologyStar TopologyHubTree Topplogy
  12. 12. Bus TopologyA single cable called a trunk (backbone, segment). Only onecomputer can send messages at a time Bus topology advantages:– It is inexpensive– It is easy to design and implement because the stationsare simply daisy-chained together Bus topology disadvantages:– It is difficult to troubleshoot– It requires termination
  13. 13. Star TopologyThe star network configuration is the most popularphysical topologyIn a star configuration, all computers or stations arewired directly to a central location:– Concentrator (a.k.a. hub)– Multistation Access Unit (MAU)A data signal from any station goes directly to thiscentral device, which transmits the signal accordingto the established network access method for thetype of network
  14. 14. Star topology advantages:– A break in one cable does not affect all other stations asit does in bus technologies– Problems are easier to locate because symptoms oftenpoint to one station– The second-easiest topology to design and install– Does not require manual termination• Instead the media is terminated in the station at thetransceiver on the NIC and in the hub or MAU
  15. 15. • Star topology disadvantages:– Hubs, which are required for a star topology, are moreexpensive than bus connectors– A failure at the hub can affect the entire configurationand all connected stations– Uses more cable than bus topologies
  16. 16. Ring TopologyEvery computer serves as a repeater to boost signalsAdvantages It prevents network collisions Each station functions as a repeater, so the topology does not requireadditional network hardware, such as hubs Disadvantages• Difficult to add computers• More expensive• If one computer fails, whole network fails
  17. 17. Tree Topology• Tree topologies integrate multiple star topologies togetheronto a bus.
  18. 18. Advantages of a Tree Topology• Point-to-point wiring for individual segments.• Supported by several hardware and software venders.Disadvantages of a Tree Topology• Overall length of each segment is limited by the type ofcabling used.• If the backbone line breaks, the entire segment goes down.• More difficult to configure and wire than other topologies.