Please provide explanations describing why and how you did it while you answer or you will get reported.

SCSR1213 Network Communication Final 10 QUESTION 2 [30 Marks] (a) Given a generator bits = 1010, and transmitted data is 111010110. The receiver use cyclic redundancy check to detect the error. Determine whether the transmitted data has error or not? Show your works. (5 marks] (b) State THREE significant characteristics for TDMA and FDMA. [6 marks] c) Table 3 describes taxonomy of Media Access Control (MAC) taxonomy. MAC protocols can be divided into three categories and each category may use different protocols. Reproduce Table 3 in your answer booklet with the correct answers. List two examples protocols in each MAC category. [4 marks] Table 3 Media Access Control Categories Protocols (d) Assume that all ARP caches have entries of all the MAC addresses as shown in Figure 7. Reproduce Table 4 below in your answer booklet with the correct answer by indicating the source/destination MAC and IP addresses at chosen points during the transmission. [4 Marks] E A 192.168.1.1 AA-AA-AA-AA-AA-AA V192.168.2 1 44-44-44-44-44-44 192.168.3.1 77-77-77-77-77-77 Y X LAN Router 1 LAN Router 2 LAN 192.168.1.2 22-22-22-22-22-22 192.168.2 2. 33-33-33-33-33-33 192.168.2 3 55-55-55-55-55 192.168.32 88-88-88-88-88-88 B 192.168.1.3 11-11-11-11-11-11 D 192.168.2.4 66-66-66-66-66 F 192.168.3 3 99-99-99-99-99-99 Figure 7 2014/2015 - 2 SCSR 1213 Network Communication Final | 11 Table 4 Point Sender Receiver Source IP address Destination IP address Source MAC address Destinati on MAC address X PC-A PC-C Y PC-B PC-F (e) Suppose now A would like to send an IP datagram to B, and all of their ARP caches are empty. Explain what happened in the network until A is able to send the datagram. [4 Marks] The switch in Figure 8 is attached to the different hosts as shown. Host PCI wants to communicate with PC4. Reproduce Table 5a and Table 5b in your answer booklet with the appropriate steps taken to update switch table and experienced by the switch in this communication. Initially the MAC address table is empty. [7 Marks] IP: 4.4.4.4 MAC: FFFFFFFF PC-PN PC2 PC-PT PC4 Fa2/1 Fa4/1 Fall Fa3/1 Switch-PT Switcha PC-PT PC1 PC-PT PC3 IP: 1.1.1.1 MAC: AA.AA.AA.AA Figure 8 Table 5a Table 5b Step # Step Description MAC Address Interface/Port 2014/2015 - 2 SCSR1213 Network Communication Final | 12