Write a 4- to 6-page paper (use tables whenever possible) to:
Question 1: Describe Open Systems Interconnection (OSI) protocol model
Question 2: Describe key concepts of circuit switching and packet switching. Identify the advantages and disadvantages of circuit switching and packet switching in term of performance, efficiency, speed and throughput potential, and end-to-end transmission reliability and predictability.
Question 3: Identify one example of circuit switch system and packet switch system respectively. List major protocols for each of these two in the framework of OSI model.
Format your paper consistent with APA guidelines.