CaseHIGH SPEED WIDE-AREA NETWORKS Assignment Overview The evolution of WAN architectures has involved a variety of dominant designs such as T-1 and T-3 lines, which are still quite popular but do not meet high-traffic demands. Instead, Frame Relay and ATM are more commonly used to provide an interface to public high-speed switched networks. ATM, SDMS, and SONET are capable of handling voice, image, and data traffic concurrently. In addition, most ATM suppliers provide permanent virtual connections of dedicated time division multiplexing (TDM) channels to set up private networks. Case 4 reviews sections 15, 16, and 18 of the Data Communication and Networking e-textbook. Case Assignment Write a 4- to 5-page report (excluding cover page and references) answering the questions below. Explain the differences between ISDN and IDN. How is ISDN accessed? What is broadband ISDN? Compare and contrast the services used in B-ISDN. Which are the three layers under X.25 protocol in relation to the OSI layer? What are the advantages and disadvantages of ATM compared with X.25? Explain the ATM protocol architecture. Give two examples of ATM networks. Assignment Expectations The report should: Demonstrate the clear understanding of the subject and address all key elements of the assignment. Show analysis, synthesis, and evaluation of required material. Demonstrate writing proficiency at the academic level of the course; address the Learning Outcomes of the assignment. Use and cite relevant and credible sources to support assertions. The report is well organized and follows the structure of a well-written paper. APA style format is applied for all citations.

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