Question: In the diagram below, from 2.4.1 Ethernet Learning Algorithm, suppose node D is connected to S5. Now, with the tables as shown by the labels

In the diagram below, from 2.4.1 Ethernet Learning Algorithm, suppose node D is connected to S5. Now, with the tables as shown by the labels in the diagram (that is, S5 knows about A and C, etc), D sends to B.

(a). Which switches will see this packet, and thus learn about D?

(b). Which of the switches in part (a) do not already know where B is and will use fallback-to-flooding?

A,C S3 AC S5 CS4

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