NETWORK TOPOLOGY
<ul><li>PHYSICAL TOPOLOGY   </li></ul><ul><li>What is a Topology? </li></ul><ul><li>Network topology defines the structure...
TYPES OF PHYSICAL TOPOLOGIES <ul><li>BUS TOPOLOGY </li></ul><ul><li>RING TOPOLOGY </li></ul><ul><li>STAR TOPOLOGY </li></u...
TYPES OF PHYSICAL TOPOLOGIES
BUS TOPOLOGY A bus topology uses a single backbone cable that is terminated at both ends. All the hosts connect directly t...
<ul><li>A bus topology consists of a main run of cable with a  </li></ul><ul><li>terminator  at each end.  </li></ul><ul><...
<ul><li>COMPONENTS REQUIRED FOR BUS TOPOLOGY: </li></ul><ul><li>CO-AXIAL CABLE </li></ul><ul><li>BNC CONNECTOR </li></ul><...
<ul><li>Advantages of a Bus Topology </li></ul><ul><li>Easy to connect a computer or peripheral to a bus Topology.  </li><...
RING TOPOLOGY A ring topology connects one host  to the next and the last host to the first. This creates a physical ring ...
<ul><li>A bus topology consists of a main run of cable with a  </li></ul><ul><li>terminator  at each end.  </li></ul><ul><...
<ul><li>COMPONENTS REQUIRED FOR RING TOPOLOGY: </li></ul><ul><li>CO-AXIAL CABLE </li></ul><ul><li>BNC CONNECTOR </li></ul>...
<ul><li>Advantages of a Ring Topology </li></ul><ul><li>Easy to connect a computer or peripheral to a bus Topology.  </li>...
STAR TOPOLOGY A star topology connects all cables to a central point of concentration.  
STAR TOPOLOGY <ul><li>A star topology is designed with each node (file server,  </li></ul><ul><li>workstations, and periph...
STAR TOPOLOGY
<ul><li>COMPONENTS REQUIRED FOR STAR TOPOLOGY: </li></ul><ul><li>TWISTED PAIR CABLE </li></ul><ul><li>RJ45 CONNECTOR </li>...
<ul><li>Disadvantages of a Star Topology </li></ul><ul><li>Requires more cable length than a bus topology. </li></ul><ul><...
<ul><li>MESH / TREE TOPOLOGY </li></ul><ul><li>A tree topology combines characteristics of linear bus  </li></ul><ul><li>a...
 
<ul><li>Advantages of a Mesh / Tree Topology </li></ul><ul><li>Point-to-point wiring for individual segments.  </li></ul><...
Extended Star Topology An extended star topology links individual stars together by connecting the hubs and/or switches.Th...
Hierarchical  Topology A hierarchical topology is similar to an extended star.
<ul><li>CONSIDERATIONS WHEN CHOOSING A TOPOLOGY </li></ul><ul><li>Money </li></ul><ul><li>A linear bus network may be the ...
 
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Hardware3

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Hardware3

  1. 1. NETWORK TOPOLOGY
  2. 2. <ul><li>PHYSICAL TOPOLOGY </li></ul><ul><li>What is a Topology? </li></ul><ul><li>Network topology defines the structure of the network. </li></ul><ul><li>One part of the topology definition is the physical topology, </li></ul><ul><li>which is the actual layout of the wire or media. </li></ul><ul><li>The other part is the logical topology, which defines how the </li></ul><ul><li>media is accessed by the hosts for sending data. </li></ul><ul><li>The following sections discuss the physical topologies used </li></ul><ul><li>in networks. </li></ul>
  3. 3. TYPES OF PHYSICAL TOPOLOGIES <ul><li>BUS TOPOLOGY </li></ul><ul><li>RING TOPOLOGY </li></ul><ul><li>STAR TOPOLOGY </li></ul><ul><li>MESH TREE TOPOLOGY </li></ul><ul><li>EXTENDED STAR TOPOLOGY </li></ul><ul><li>HIERARCHIAL TOPLOGY </li></ul>
  4. 4. TYPES OF PHYSICAL TOPOLOGIES
  5. 5. BUS TOPOLOGY A bus topology uses a single backbone cable that is terminated at both ends. All the hosts connect directly to this backbone.
  6. 6. <ul><li>A bus topology consists of a main run of cable with a </li></ul><ul><li>terminator at each end. </li></ul><ul><li>All nodes (file server, workstations, and peripherals) are </li></ul><ul><li>connected to the linear cable. </li></ul><ul><li>Ethernet and Local Talk networks use a linear bus topology. </li></ul>BUS TOPOLOGY
  7. 7. <ul><li>COMPONENTS REQUIRED FOR BUS TOPOLOGY: </li></ul><ul><li>CO-AXIAL CABLE </li></ul><ul><li>BNC CONNECTOR </li></ul><ul><li>T-CONNECTOR </li></ul><ul><li>TERMINATE RESISITOR </li></ul><ul><li>ETHERNET CARD </li></ul><ul><li>Terminate Resistor - A device that provides electrical </li></ul><ul><li>resistance at the end of a transmission line. Its function </li></ul><ul><li>is to absorb signals on the line, thereby keeping them </li></ul><ul><li>from bouncing back and being received again by the network. </li></ul>
  8. 8. <ul><li>Advantages of a Bus Topology </li></ul><ul><li>Easy to connect a computer or peripheral to a bus Topology. </li></ul><ul><li>Requires less cable length than a star topology. </li></ul><ul><li>Disadvantages of a Bus Topology </li></ul><ul><li>Entire network shuts down if there is a break in the main cable. </li></ul><ul><li>Terminators are required at both ends of the backbone cable. </li></ul><ul><li>Difficult to identify the problem if the entire network shuts down. </li></ul><ul><li>Not meant to be used as a stand-alone solution in a large </li></ul><ul><li>building. </li></ul>
  9. 9. RING TOPOLOGY A ring topology connects one host to the next and the last host to the first. This creates a physical ring of cable.
  10. 10. <ul><li>A bus topology consists of a main run of cable with a </li></ul><ul><li>terminator at each end. </li></ul><ul><li>All nodes (file server, workstations, and peripherals) are </li></ul><ul><li>connected to the linear cable. </li></ul><ul><li>Ethernet and Local Talk networks use a linear bus topology. </li></ul>RING TOPOLOGY
  11. 11. <ul><li>COMPONENTS REQUIRED FOR RING TOPOLOGY: </li></ul><ul><li>CO-AXIAL CABLE </li></ul><ul><li>BNC CONNECTOR </li></ul><ul><li>T-CONNECTOR </li></ul><ul><li>ETHERNET CARD </li></ul>
  12. 12. <ul><li>Advantages of a Ring Topology </li></ul><ul><li>Easy to connect a computer or peripheral to a bus Topology. </li></ul><ul><li>Requires less cable length than a star topology. </li></ul><ul><li>Disadvantages of a Ring Topology </li></ul><ul><li>Entire network shuts down if there is a break in the main cable. </li></ul><ul><li>Terminators are required at both ends of the backbone cable. </li></ul><ul><li>Difficult to identify the problem if the entire network shuts down. </li></ul><ul><li>Not meant to be used as a stand-alone solution in a large </li></ul><ul><li>building. </li></ul>
  13. 13. STAR TOPOLOGY A star topology connects all cables to a central point of concentration.  
  14. 14. STAR TOPOLOGY <ul><li>A star topology is designed with each node (file server, </li></ul><ul><li>workstations, and peripherals) connected directly to a </li></ul><ul><li>central network hub or switch. </li></ul><ul><li>Data on a star network passes through the hub or switch </li></ul><ul><li>before continuing to its destination. </li></ul><ul><li>The hub or switch manages and controls all functions of </li></ul><ul><li>the network. It also acts as a repeater for the data flow. </li></ul><ul><li>This configuration is common with twisted pair cable, </li></ul><ul><li>it can also be used with fiber optic cable also. </li></ul>
  15. 15. STAR TOPOLOGY
  16. 16. <ul><li>COMPONENTS REQUIRED FOR STAR TOPOLOGY: </li></ul><ul><li>TWISTED PAIR CABLE </li></ul><ul><li>RJ45 CONNECTOR </li></ul><ul><li>ETHERNET CATD </li></ul><ul><li>HUB OR SWITCH </li></ul><ul><li>Advantages of a Star Topology </li></ul><ul><li>Easy to install and wire. </li></ul><ul><li>No disruptions to the network while connecting </li></ul><ul><li>or removing devices. </li></ul><ul><li>Easy to detect faults and to remove parts. </li></ul>
  17. 17. <ul><li>Disadvantages of a Star Topology </li></ul><ul><li>Requires more cable length than a bus topology. </li></ul><ul><li>If the hub or switch fails, nodes attached are disabled. </li></ul><ul><li>More expensive than bus topologies because of the cost </li></ul><ul><li>of the concentrators. </li></ul><ul><li>The protocols used with star configurations are usually </li></ul><ul><li>Ethernet or Local Talk. Token Ring uses a similar topology </li></ul><ul><li>called the star-wired ring. </li></ul>
  18. 18. <ul><li>MESH / TREE TOPOLOGY </li></ul><ul><li>A tree topology combines characteristics of linear bus </li></ul><ul><li>and star topologies. It consists of groups of star-configured </li></ul><ul><li>workstations connected to a linear bus backbone cable. </li></ul><ul><li>Tree topologies allow for the expansion of an existing </li></ul><ul><li>network and enable schools to configure a network to </li></ul><ul><li>meet their needs. </li></ul>
  19. 20. <ul><li>Advantages of a Mesh / Tree Topology </li></ul><ul><li>Point-to-point wiring for individual segments. </li></ul><ul><li>Supported by several hardware and software venders. </li></ul><ul><li>Disadvantages of a Mesh / Tree Topology </li></ul><ul><li>Overall length of each segment is limited by the type of </li></ul><ul><li>cabling used. </li></ul><ul><li>If the backbone line breaks, the entire segment goes down. </li></ul><ul><li>More difficult to configure and wire than other topologies. </li></ul>
  20. 21. Extended Star Topology An extended star topology links individual stars together by connecting the hubs and/or switches.This topology can extend the scope and coverage of the network.
  21. 22. Hierarchical Topology A hierarchical topology is similar to an extended star.
  22. 23. <ul><li>CONSIDERATIONS WHEN CHOOSING A TOPOLOGY </li></ul><ul><li>Money </li></ul><ul><li>A linear bus network may be the least expensive </li></ul><ul><li>way to install a network. </li></ul><ul><li>2. Length of cable needed </li></ul><ul><li>The linear bus network uses shorter lengths of cable. </li></ul><ul><li>3. Future growth </li></ul><ul><li>With a star topology, expanding a network is easily </li></ul><ul><li>done by adding another concentrator. </li></ul><ul><li>4. Cable type </li></ul><ul><li>The most common cable using in LAN is unshielded </li></ul><ul><li>twisted pair, which is most often used with star topologies. </li></ul>

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