QUESTION 2 [15 Marks] (a) i) In Carrier Sense Multiple Access (CSMA), if all nodes do carrier sensing before transmit, briefly explain why does collision still occur? [2 marks] ii) Describe one difference between random access and taking turns multiple access protocols. [3 marks) (b) With regards to ARP table, answer the following questions: i) When we first boot (switch on) a computer, what is the content of the ARP table? [1 Mark) ii) Refer to Figure 2 below. If PC-B has had some communications with all hosts EXCEPT Laptop-A, what will the ARP table of PC-B looks like? Construct the ARP table for PC-B (you can ignore the TTL) with the contents. [4 Marks] Fao Laptop- P: 192.168.2.5 MAC: FL-F1-F1-F1-F1-F1 FO PC-A Router 0/1 P: 192.168.1.2 MAC AA-AA-AA-M-AA-AA Fast Ethernet0/0 IP: 192.168.1.1 MAC: 01-01-01-01-01-01 Fast Ethernet0/11 IP 192.168.2.1 MAC: 02-02-02-02-02-02 Fab Fa0/4 Fa0/2 Fa0/3 Swo Wireless Router P. 192.168.2.2 MAC 03-03-03-03-03-03 TO PCE IP 192.168.2.1 MACEE-EE-EE-EE-EE-EE PC-B P: 192.168.1.3 MAC B8-88-8-8-8-88 Fa0/1 Fa0/2 Fao Fab SW1 Laptop B IP 192.168.1.5 MAC DD-DO-DD-DO-DD.CO PC-C P: 192.168.1.4 MAC: CC-CC-CC-CC-CC-CC Figure 2 (c) A data of 100100001 was successfully received by the receiving host. Using the CRC technique and Generator of 1101, clarify the error status of the received data. Show all workings. [5 Marks ]