Question: (10 pts) ARP and Switch Self-Learning S1 S2 S3 S4 A B C D E F 1 2 3 1 3 2 3 1 2

  1. (10 pts) ARP and Switch Self-Learning

    S1

    S2

    S3

    S4

    A

    B

    C

    D

    E

    F

    1

    2

    3

    1

    3

    2

    3

    1

    2

    3

    1

    2
    The following network has 9 hosts (A-F) and 4 switches (S1-S4) marked with link numbers. Suppose that host A and D have completed DHCP and so they both know their own IP address. Also, the IP address of D is already known to A.

  1. Now, an application in Host A gives a small message to a UDP socket to deliver the message to host D. Explain which packets are sent by host A and which packets are sent by host D.
    1. Now suppose that the application in host D generates a UDP response. Explain which packets are sent by Host D and which packets are sent by Host A.

    1. Assuming all switch forwarding tables are initially empty, fill each switch's forwarding table after both operations described above are performed.

  5. S1

    S2

    S3

    S4

    Dest.

    Port

    Dest.

    Port

    Dest.

    Port

    Dest.

    Port

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