References must be in APA citation format. All posts must be a minimum of 250-300 words. 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?Forum Grading Criteria Forum Grading CriteriaMaximum Points Appropriate use of terms, correct spelling and grammar 0.75 Uses external resources validating position with applicable knowledge 0.75Participation in forum with well-formed answers and conclusions 0.75Posting to fellow classmates 0.75 Total Points: 3.0

To prepare for this Assignment, consider the personal SWOT analysis you completed and the goals you developed in Week 1. Reflect upon your experiences so far in this program and any insights you have gained since you created those goals. In addition, review your PLN plan from Week 4 and the results of “The New Drivers of Leadership” Self-Assessment that you completed this week. Finally, return to the interactive media “Voices of DBA Students.” This time, focus on the independent scholars’ descriptions of their goals, their plans, and the challenges they faced in achieving their goals. You will use the Professional Development Plan template to complete this Assignment.Submit a 4- to 5-page (excluding a title page and References section) Professional Development Plan (PDP). In your Plan, do the followingA statement of your goal An explanation of your motivation for wanting to achieve the goal and how it relates to your personal values A brief description of the steps you intend to take to accomplish your goal, including any relevant tools, strategies, or resourcesAn explanation of how you plan to use technology and/or social media to promote completion of your goalAn explanation of how these steps reflect consideration of personal strengths and weaknesses relevant to the goalA timeline for completion of your goalUse your SWOT analysis, PLN, and “The New Drivers of Leadership” Self-Assessment results as guides to ensure alignment.