We have 5 devices connected to an 8-port Hub. Each device is numbered starting w
ID: 3726939 • Letter: W
Question
We have 5 devices connected to an 8-port Hub. Each device is numbered starting with 0, and each port of the Hub is also numbered starting with 0. Device 0 has MAC address Co-CC-F8-4F-8B-AD and is connected to port 0 of the Hub Device 1 has MAC address 00-01-24-92-AE-21 and is connected to port 1 of the Hub. Device 2 has MAC address 00-OF-66-E0-67-CE and is connected to port 2 of the Hub. Device 3 has MAC address 78-2B-CB-5A-4D-52 and is connected to port 3 of the Hub. Device 4 has MAC address 00-01-24-34-CF-F5 and is connected to port 4 of the Hub The Hub and all the devices are cold-started, and the following Ethernet frames are sent on the network in sequence Frame 0 (source 78-2B-CB-5A-4D-52 destination 00-01-24-92-AE-21) Frame 1 (source 00-01-24-92-AE-21 destination CO-CC-F8-4F-8B-AD) Frame 2 (source 00-01-24-34-CF-F5 destination 78-2B-CB-5A-4D-52) Frame 3 (source 00-01-24-34-CF-F5 destination 00-0F-66-E0-67-CE) Frame 4 (source 00-01-24-92-AE-21 destination 00-01-24-34-CF-F5) The following questions ask you to find out which of these frames will be heard at selected ports. Your answer must be a comma-separated list of frame numbers in the order heard at the port. la. Assuming you are monitoring port 0 of the Hub, which of the frames would be heard at this port? [1 mark(s) lb. Assuming you are monitoring port 1 of the Hub, which of the frames would be heard at this port? [1 mark(s) lc. Assuming you are monitoring port 2 of the Hub, which of the frames would be heard at this port? [ mark(s) ld. Assuming you are monitoring port 3 of the Hub, which of the frames would be heard at this port? [1 ark(s)Explanation / Answer
Solution:
a)
The device 0 with MAC address E8-B2-AC-2B-2B-D2 is associated to port 0 of hub. There is no frame that is any one from Frame 0 to Frame 3 whose destination MAC address is same as of device 0. Hence, there will be no frames at port 0 of hub.
b)
The device 1 with MAC address F0-1F-AF-F7-DB-5E is associated to port 1 of hub. Frame 1 and Frame2 are sent over network to destination address FO -1F-AF-F7-DB-5E. Hence, frame 1 & frame 2 will be heard at port 1 of hub.
c)
The device 2 with MAC address F0-1F-AF-22-A1-D1 is associated to port 2 of hub. Frame 0 is sent over network to destination address F0-1F-AF-22-A1-D 1. Hence, frame 0 will be heard at port 2 of hub.
d)
The device 3 with MAC address 34-97-F6-F1-A6-A0 is associated to port 3 of hub. Frame 3 is sent over network to destination address 34-97-F6-F1-A6-A0. • Hence, frame 3 will be heard at port 3 of hub.
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