Consider hosts X, Y, Z, W and learning bridges B1, B2, B3, with initially empty forwarding tables, as in Figure 3.48.

(a) Suppose X sends to Z. Which bridges learn where X is? Does Y’s network interface see this packet?

(b) Suppose Z now sends to X. Which bridges learn where Z is?
Does Y’s network interface see this packet?

(c) Suppose Y now sends to X. Which bridges learn where Y is?
Does Z’s network interface see this packet?

(d) Finally, suppose Z sends to Y. Which bridges learn where Z is?
Does W’s network interface see this packet?

Figure 3.48)

Transcribed Image Text:

X B1 B2 Y N B3 W