1 / 17

Local Area Network Topology

Local Area Network Topology. LAN Architecture. - Protocol architecture - Topologies - Media access control - Logical Link Control. Topologies. is the arrangement of the various elements ( links ,  nodes Computers ) - Tree - Bus - Ring - Star. LAN Topologies.

colorado-lancaster
Download Presentation

Local Area Network Topology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Local Area Network Topology

  2. LAN Architecture - Protocol architecture - Topologies - Media access control - Logical Link Control

  3. Topologies is the arrangement of the various elements (links, nodes Computers ) - Tree - Bus - Ring - Star

  4. LAN Topologies

  5. Bus and Tree each node is connected to a single cable The cable has start and end point- - Multipoint medium - Transmission propagates throughout medium - when send massege Need to identify target station Each station has unique address - Full duplex connection between station and tap Allows for transmission and reception - Need to regulate transmission To avoid collisions Data in small blocks - frames - Terminator absorbs frames at end of medium

  6. Frame Transmission - Bus LAN

  7. Disadvantages and Advantages of a Linear Bus Topology Advantages: - Easy to connect a computer or peripheral to a linear bus. - - Requires less cable length than a star topology. Disadvantages : - Entire network shuts down if there is a break in the main cable. - Terminators are required at both ends of the backbone cable. - Difficult to identify the problem if the entire network shuts down. - Not meant to be used as a stand-alone solution in a large building.

  8. Star Topology - Each station connected directly to central ode ((Usually via two point to point links Data on a star network passes through the hub, switch, or concentrator before continuing to its destination. The hub, switch, or concentrator manages and controls all functions of the network – - Only one station can transmit at a time - Central node can act as frame switch

  9. Advantages and Disadvantages Star Topology Advantages : - Easy to install and wire. - No disruptions to the network when removing devices. - Easy to detect faults and to remove parts. - Disadvantages : - Requires more cable length than a linear topology. - If the hub, switch, or concentrator fails, nodes attached are disabled. - More expensive than linear bus topologies because of the cost of the hubs, etc.

  10. Tree or Expanded Star - A tree topology combines characteristics of linear bus and star topologies. - It consists of groups of star-configured workstations connected to a linear bus backbone cable - Tree topologies allow for the expansion of an existing network

  11. Advantages and Disadvantages tree Topology Advantages : - Point-to-point wiring for individual segments. - Supported by several hardware and software venders. Disadvantages : - Overall length of each segment is limited by the type of cabling used. - If the backbone line breaks, the entire segment goes down. - More difficult to configure and wire than other topologies.

  12. Ring A network topology that is set up in a circular fashion in which data travels around the ring in one direction and each device on the right acts as a repeater to keep the signal strong as it travels

  13. Frame TransmissionRing LAN

  14. Considerations When Choosing a Topology Money. A linear bus network may be the least expensive way to install a network; you do not have to purchase concentrators. Length of cable needed. The linear bus network uses shorter lengths of cable. Future growth. With a star topology, expanding a network is easily done by adding another concentrator. Cable type. The most common cable in schools is unshielded twisted pair, which is most often used with star topologies

More Related