ab:34:56:00:12:22 cd:ef:22:33:45:ff 10.10.0.21 10.10.0.1 55055 23 user data trailer Dest Source Src Dest Source Dest. A B C 1. What is the name of the PDU shown in Figure 2 enclosed in area A? (3 marks) 2. What is the name of the PDU shown in Figure 2 enclosed in area B? (3 marks) 3. What is the name of the PDU shown in Figure 2 enclosed in area C? (3 marks) 4. What is the application layer protocol associated with this message? (3 marks) Figure 2 5. What is the transport layer protocol most often associated with the application layer protocol mentioned in the previous question? (3 marks)