SINGAPORE POLYTECHNIC B4. Refer to Figure B4.1 to answer the following questions: R1# show running-config version 15.2 1 interface Gigabit Ethernet0/0 ip address 172.16.1.1 255.255.255.0 1 interface Serial0/0/0 bandwidth 64 ip address 172.16.3.1 255.255.255.252 clock rate 64000 1 interface Serial0/0/1 ip address 192.168.10.5 255.255.255.252 1 router eigrp 1 network 172.16.0.0 network 192.168.10.0 eigrp router-id 1.1.1.1 R2# show running-config version 15.2 1 interface GigabitEthernet0/0 ip address 172.16.2.1 255.255.255.0 1 interface Serial0/0/0 bandwidth 64 ip address 172.16.3.2 255.255.255.252 1 interface Serial0/0/1 bandwidth 1024 ip address 192.168.10.9 255.255.255.252 clock rate 64000 1 router eigrp 1 network 172.16.0.0 network 192.168.10.8 0.0.0.3 eigrp router-id 2.2.2.2 R3# show running-config version 15.2 1 ET0010 Interface GigabitEthernet0/0 ip address 192.168.1.1 255.255.255.0 1 interface Serial0/0/0 ip address 192.168.10.6 255.255.255.252 clock rate 64000 1 End of Paper - interface Serial0/0/1 bandwidth 1024 ip address 192.168.10.10 255.255.255.252 router eigrp 1 network 192.168.1.0 network 192.168.10.4 0.0.0.3 network 192.168.10.8 0.0.0.3 eigrp router-id 3.3.3.3 Figure B4.1 (a) Using the given outputs of the running configuration for the three routers, draw the network diagram showing the connections between routers, and providing appropriate labelling for port interface, IP address and subnet mask for each interface of the routers. (7 marks) (b) From the given configurations, what are the current router ids for Router R1, R2 and R3? (3 marks) (c) Assuming a fresh configuration where both the router-id command and loopback configuration are not applied to each router. What will be the new router-ids for Router R1, R2 and R3? (3 marks) (d) Identify the routing protocol used in the network above and list one disadvantage of using this routing protocol in a network. (2 marks)