1 / 32

CIT 307 Online Data Communications

CIT 307 Online Data Communications. Virtual Circuit Switching. Kevin Siminski, Instructor. Module 15. Virtual circuit wide area network. VCI- Virtual Channel Index. Phases of VCI. Switch and table. Source – destination transfer. Switched Virtual Circuit request. SVC acknowledgement.

kedma
Download Presentation

CIT 307 Online Data Communications

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. CIT 307 OnlineData Communications Virtual Circuit Switching Kevin Siminski, Instructor Module 15

  2. Virtual circuit wide area network

  3. VCI- Virtual Channel Index

  4. Phases of VCI

  5. Switch and table

  6. Source – destination transfer

  7. Switched Virtual Circuit request

  8. SVC acknowledgement

  9. Frame Relay • Architecture • Frame Relay Layers • FRAD • VOFR • LMI

  10. Frame Relay Network

  11. Frame Relay- DLCIs VCIs in Frame Relay are called DLCIs.

  12. Frame Relay Layers

  13. Frame relay operation Frame Relay operates only at the physical and data link layers. Therefore, it can be considered a Layer 2 technology

  14. Architecture of a Frame Relay fram

  15. Flow control & Frame Relay Frame Relay does not provide flow or error control; they must be provided by the upper-layer protocols.

  16. FRAD

  17. ATM – NOT YOUR CASH MACHINES! • Design Goals • Problems • Architecture • Switching • Layers

  18. Multiplexing using different frame sizes

  19. ATM Cell A cell network uses the cell as the basic unit of data exchange. A cell is defined as a small, fixed-sized block of information.

  20. Multiplexing using Cells

  21. ATM Multiplexing

  22. Architecture on an ATM Network

  23. TP, VPs, and VCs

  24. VPs and VCs example

  25. Virtual Connection Note that a virtual connection is defined by a pair of numbers: the VPI and the VCI.

  26. Connection Identifiers

  27. UNIs and NNIs

  28. ATM Cell

  29. Routing with an ATM switch

  30. ATM Header

  31. ATM Services • Predecessor to IP Quality of Service (QoS) • Constant Bit Rate • Variable Bit Rate • Available Bit Rate • Unspecified Bit Rate • Some still maintain ATM offers superior QoS control plane

  32. ATM Today? • IP QoS has matured to a production level technology • ATM networks very expensive • Limited interface speeds • Overhead limits steal valuable bandwidth • appx. 12% - 14% overhead

More Related