Question 1: Explain the differences between the following network devices: hub, bridge, switch, router, firewall

Question 1: Explain the differences between the following network devices: hub, bridge, switch, router, firewall.  Where would you utilize each device and why?  Where does each device reside within the OSI model?

Question 2: Define what VPNs are and used for.  Distinguish hardware VPN devices and appliances from software devices. Give examples of both.  How do VPNs work?  Why would one use a VPN?  What are the downsides of using VPNs?

Question 3: Describe four wireless technologies.  Describe what each one does and briefly how it works?   How is each one different from the other wireless technologies?  Why would you use one over the other?

Question 4: Describe what cloud computing is.  Describe the three cloud computing models.  Discuss why and when you would utilize each model.  Give examples. 

Question 5: Describe in detail what the Internet of Things (IoT) is.  What are the issues with IoT?  Do you believe IoT is the wave of the future (yes or no, and why)?  How will IoT impact the overall internet?