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Posted: December 15th, 2023

The Reference Model is a conceptual framework for understanding how computers communicate. The OSI model defines seven different layers of communication rules. Each layer of the OSI model has its own means of communication or protocol. The OSI model is used as a reference when explaining how data passed over the network moves through each layer. Each of the seven layers has specific responsibilities and logically interfaces to the layer above or below it. Each layer in the OSI model provides a different service needed for communication across an IP network and physical media. The top three layers often are called the “upper layers” since they deal primarily with application data. The lower layers deal primarily with getting packets to their destination. Many refer to these layers as infrastructure.
Questions:
1. For this discussion, compare and contrast two layers of the Open Systems Interconnection (OSI) Reference Model, including the protocols that run on each layer.
2. What was the reason that IPv6 was introduced? Why do you think many organizations are not upgrading their network solely to IPv6 and run that protocol instead of running IPv4?
3. What is the purpose of subnetting when using IPv4 addressing? What role does subnet mask play in subnetting of IPv4?
Discussion Guidelines.
Rubrics
This table lists criteria and criteria group names in the first column. The first row lists level names and includes scores if the rubric uses a numeric scoring method. You can give feedback on each criterion by tabbing to the add feedback buttons in the table.CriteriaExemplary
Accomplished
Developing
Beginning
Did Not Attempt
Criterion Score
Substance
45 points
Student answered/addressed all aspects of the topic/question posed in the Forum; analysis of concepts and theories clearly demonstrates superior knowledge and a clear understanding of the topic; relevant and scholarly resources were located and used appropriately; facts and examples are used in support of presentation.
38.25 points
Student answered/addressed most aspects of the question/topic posed in the Forum; a basic understanding of relevant concepts/theories is demonstrated; relevant sources were located; minimal or no facts/examples were used in support of presentation.
33.75 points
Posting and/or presentation evidences some confusion concerning topics under discussion; analysis may be lacking and/or elements of the question are not answered; support may be lacking.
29.25 points
Presentation is unclear; a basic understanding of the topic and issues is not evident; explanation is lacking; segments of the required answer are lacking; sources and supporting facts are not utilized; length requirements may not have been met.
0 points
Student failed to respond to the question(s)
Score of Substance,/ 45
Collaboration
35 points
Replies were substantive, thoughtful responses and contributed to the discussion; student exceeded minimum requirements by answering all queries posed to him by others and remained present and actively engaged in the discussion throughout the week; student led the discussion by raising complex issues, connecting concepts, and illuminating the discussion with examples.
29.75 points
Evidence shows an understanding of the discussion topic and the views of colleagues. Student failed to respond to specific queries posed to him by colleagues or by the Instructor. Student did not take initiative in advancing the discussion throughout the week.
26.25 points
22.75 points
Student completed minimum requirements.
0 points
Student filed none of the required replies.
Score of Collaboration,/ 35
Writing
10 points
Student demonstrates a quality of writing consistent with scholarly works in the relevant discipline; student is facile in the use of subject-matter vocabulary and terminology consistent with the level of instruction; student applies concepts with ease; writing style and organization are designed to successfully convey the message and the related information to the reader with maximum effect.
8.5 points
Student demonstrates consistent and correct use of the rules of grammar usage, punctuation, and spelling. Language is clear and precise throughout all submissions. Sentences display consistently strong, varied structure and organization is excellent.
7.5 points
Student demonstrates consistent and correct use of the rules of grammar usage, punctuation and spelling, with a few errors; there is room for improvement in writing style and organization.
6.5 points
Writing contains several grammatical, punctuation, and/or spelling errors. Language lacks clarity or includes some use of jargon and /or conversational tone; sentence structure is awkward.
0 points
Student failed to respond to the essay question.
Score of Writing,/ 10
This table lists criteria and criteria group names in the first column. The first row lists level names and includes scores if the rubric uses a numeric scoring method. You can give feedback on each criterion by tabbing to the add feedback buttons in the table.TimelinessOn Time
Late
Criterion Score
Timeliness
10 points
Submission is early or on time.
0 points
Submission is late and therefore a late penalty has been applied.
Score of Timeliness,/ 10
Rubric Total ScoreTotalScore of ISSC Forum Grading Rubric,/ 100Criterion score has been overridden
Overall Score
Overall Score
Exemplary90 points minimum
Accomplished80 points minimum
Developing70 points minimum
Beginning60 points minimum
Did Not Attempt0 points minimum