5. Learning Switch Below is an Ethernet switch connecting Classic Ethernet segme

Question

5. Learning Switch Below is an Ethernet switch connecting Classic Ethernet segments 1, 2 and 3 of a small LAN. The column "Event of first table lists packets that are sent on the LAN after startup. After each of these packets is sent, list which MAC addresses the switch knows are reachable on an interface, as well as which segments hear the transmission. Initially, the Switch Table is empty so it is not shown. Pct Peef Segment 1 2 Segment 2 3 Fort P Q What does the Switch know? Which Segments see Computers onComputer on Computer on the packet? Event Switch powers on None Interface l l interface 2 Interface 3 None None ne X broadeasts P broadeasts After the above transfer of packets, fill in the Switch table: Switch Table Destination | Interface

Explanation / Answer

Switch Table:

After transfering of packets switch will come to know which packets came from which interface.

Switch will update table based on transfer packets from source to destination.

The switch table is below based on sequence of packet tranferer mentioned in question.

From A->B & B->A. switch came to know, A & B are connected to interface 1.

But there is no packet transfer as a source C & did not get any packet as destination C node. So C is at unknown location.

Based on X broadcasts packet, Y->A, Y->X, X->Z & Z->X switch came to know X,Y,Z are connected to interface 2.

Based on P broadcasts packet and Q->P sequence, Swithch came to know P & Q are connected to interface 3.

Destination Interface A 1 B 1 C None X 2 Y 2 Z 2 P 3 Q 3

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