4. ARP (Address Resolution Protocol) Consider the figure below. The IP and MAC a
ID: 3718425 • Letter: 4
Question
4. ARP (Address Resolution Protocol) Consider the figure below. The IP and MAC addresses are shown for nodes A, B, C and D, as well as for the router's interfaces. 74-FB-E1-F2-32-37 128.119.195.61 EF-1D-B3-3C-DB-E5 128.119.195.76 1B-75-A3-6A-E7-B7 128.119.47.54 B1-61-A8-27-05-28 128.119.189.149 (1) (2) EC-1F-A8-18-B5-B8 128.119.47.116 78-3B-07-B8-5C-F8 128.119.47.9 A1-E4-22-04-1B-5D 128.119.180.31 Before doing this problem, you might want to reread the section on ARP in chapter 6 and view these youtube videos https://www.youtube.com/watch?v=aamG4-tH m8 and https://www.youtube.com/watch?v=QPi5Nvxaosw Consider an IP datagram being sent from node A to node C. Give the source and destination Ethernet (MAC) addresses, as well as the source and destination addresses of the IP datagram encapsulated within the Ethernet frame at points (1), (2), (4), and (6) in the figure above. (Note: If the address are the same you can write "same as point (#)"). A. At point (1) MAC source, destination address: IP source, destination address: B. At point (2) C. At point (4) D. At point (6)Explanation / Answer
Answer B. At point (1)
MAC source address : B1-61-A8-27-05-28
MAC destination address: A1-E4-22-04-1B-5D
IP source address : 128.119.180.140
IP destination address: 128.119.47.54
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Answer B. At point (2)
MAC source address : A1-E4-22-04-1B-5D
MAC destination address: 74-F0-E1-F2-32-37
IP source and destination address: same as point (1)
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At point (3)
MAC source address : 74-F0-E1-F2-32-37
MAC destination address: EC-1F-A0-18-B5-B8
IP source and destination address: same as point (1)
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Answer C. At point (4)
MAC source address : EC-1F-A0-18-B5-B8
MAC destination address: 1B-75-A3-6A-E7-B7
IP source and destination address: same as point (1)
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Answer D. At point (6)
MAC destination address: 1B-75-A3-6A-E7-B7
IP source and destination address: same as point (1)
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