(Problem 11 – 13). Assume 5 PCs are connected to switch as shown below table and
ID: 3887304 • Letter: #
Question
(Problem 11 – 13). Assume 5 PCs are connected to switch as shown below table and mac address table at switch is initially empty.
Stations
Mac Address
Connecting Port on Switch
PC0
0198.a9f4.0001
E0
PC1
0198.a9f4.0002
E1
PC2
0198.a9f4.0003
E2
PC3
0198.a9f4.0004
E3
PC4
0198.a9f4.0005
E4
11. First, PC3 transmits a packet to PC1. Show the updated mac address table at switch from this transmission and explain how to forward the packet to destination. (5 points)
12. After the first transmission as in problem 11, PC0 sends a packet to PC3. Show the updated mac address table at switch from this transmission and explain how to forward the packet to destination. (5 points)
13. After first two transmissions as in problem 11 and 12, two other transmissions occur. One packet is from PC4 to PC2 and the other packet is from PC3 to PC0. How many new mac addresses the switch learns since last transmission by problem 12. Show updated mac address table. (5 points)
Stations
Mac Address
Connecting Port on Switch
PC0
0198.a9f4.0001
E0
PC1
0198.a9f4.0002
E1
PC2
0198.a9f4.0003
E2
PC3
0198.a9f4.0004
E3
PC4
0198.a9f4.0005
E4
Explanation / Answer
11)
When the PC3 send the packet to the switch it does not have the address of the destination Mac address so it send a Broadcast Message to all the port with the default MAC address ff:ff:ff:ff:ff:ff then it store the address of PC3 and PC1.
12)
When the PC0 send the packet to the PC3 the switch already know the PC3 Mac address from the before packet transfer and it only store the Mac address of the PC0
13)
There are two new MAC address updates in the MAC table of PC4 and PC2.
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Station Mac address Connecting port PC0 E0 PC1 0198.a9f4.0002 E1 PC2 E2 PC3 0198.a9f4.0004 E3 PC4 E4Related Questions
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