Module 3 - CaseDATA LINK PROTOCOL AND COMMUNICATION NETWORKS

 

Assignment Overview

The transmission of a data stream from one device to another requires cooperation from all transmitting sites through synchronization. In asynchronous transmissions, each character of data is treated independently, and each byte begins with a start bit for the receiving end to know that a character is arriving; however, sending data in one block is more efficient than sending one character at the time. Each block of data is formatted as a frame. A form of synchronization such as the Manchester encoding is used. It is possible for errors to occur in transmission, and for this reason, the HDLC protocol creates a layer of control. Circuit switching is used in public telephone networks but is also used for dedicated lines to establish the path between two stations. Packet switching is an efficient way in the design of share facilities in a communication network.

Case 3 reviews sections 10, 11, and 14 of the Data Communication and Networking e-textbook.

Case Assignment

Write a 4- to 5-page report (excluding cover page and references) answering the following questions.

1. What are the functions of data link?
2. Why and where is flow control needed? Explain its parameters.
3. Explain stop-and-wait flow control with special reference to the handling of (i) a damaged frame (ii) a lost frame.
4. Explain HDLC. What are the categories of HDLC stations?
5. What is the configuration and modes of HDLC?
6. What does "switching" mean? Explain the three possible switching methods.

Assignment Expectations

The report should:

• Demonstrate 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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