4. Smartphone0 is connected to both Cellular and Wireless networks as shown in Figure 1. Explain the path taken for a packet to reach Router0 from Smartphone0. (6 Marks) SMARTPHONE-PT Smartphone0 Hub-PT 1841 WRT300N Wireless Router1 Hubo RouterO Cell-Tower Cell Tower0 CO Central-Office-Server Central Office Server 5. Figure 1 RFID (Radio Frequency Identification) is a form of wireless communication that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency portion of the electromagnetic spectrum to uniquely identify an object, animal or a person. a) Many businesses today tend to use RFID instead of barcode for inventory tracking. Why? Justify your answer with any TWO (2) reasons. (4 Marks) b) Besides inventory tracking, identify another FOUR (4) applications of RFID. (4 Marks) c) Explain any THREE (3) possible factors that should be considered when deciding on either to use barcode or RFID. (6 Marks) [Total: 14 Marks] 6. You are outlining your plans for implementing a wireless network to upper management. Suddenly, a vice president brings up the question of security. a) Explain any THREE (3) possible security issues that you need to consider related to wireless network. (6 Marks) b) Based on your answer in Question 6 (a), suggest any THREE (3) security defenses that you may consider protecting your wireless network. *** END OF QUESTION PAPER *** 4 (6 Marks) [Total: 12 Marks]