Q2: What mechanism is used to detect/avoid/correct data transmission collisions in Layer 2, such as Ethernet and WiFi? Describe the mechanism in sufficient detail. (10 points) Q3: Describe how a cell phone obtains its IP address in the 3GPP/IMS packet switching system. (10 points) Q4: What is Distance-Vector Routing? What is Link-State Routing? What is Dijkstras Algorithm? What is Bellman-Ford Algorithm? Describe each in detail, give examples. (20 points) Q5: Describe at least 5 Big Data analysis/process methods. Which data analysis/process method is most suitable for Big Data. Justify your answer. (10 points)