Question of the Week 7

Assume that SW-AC1 and SW-AC2 have default congurations. What will happen if PC-1 sends a broadcast? A. PC 1,2 and Fa0/0 interface of Router will receive the broadcast. B. PC 1,2,3,4 and the interface Fa0/0 of R1 will receive the broadcast. C. PC 1,2,3 and 4 will receive the broadcast. D. PC-2 and Fa0/0 interface of Router will receive the broadcast.

Question 7

Answer to the Question

D To better understand, first we should understand the forward and filter decision of a switch. To decide whether to forward a frame, a switch uses a dynamically built table that lists MAC addresses and outgoing interfaces. Switches compare the frame’s destination MAC address to this table to decide whether the switch should forward a frame or simply ignore it. In the above scenario, the destination MAC address would be FFFF.FFFF.FFFF The frame with the destination MAC address: FFFF.FFFF.FFFF is forwarded to all ports within a network except from the port that sent it. So the frame will be received by only PC-2 and Fa0/0 interface of Router.