Predicting STP Impact on MAC Tables

[jgse19811]

Hi all. I am self studying Cisco CCNA R&S ICND2. On page 110. It teaches about Predicting STP Impact on MAC Tables. In VLAN1, when SW2 floods out of port Gi0/1, SW3 ignores it as SW3 port Gi0/2 is blocked but Server A points to SW2 Gi0/2 which connects direct to SW1s port Gi0/2. SW1 is the root switch. Should server A not connect SW3 Gi0/3 then out SW3 Gi0/1 and in SW1 Gi0/2? I don’t understand how server A points to SW2 port Gi0/2 when SW3 port Gi0/2 is blocked. Please see photo attached, Kind Regards Jonathan Edwards

[Jon Marshall]

You are misunderstanding what that sentence says. 

What it is saying is if you look at the mac address table on SW2 the mac address of server A will show the interface it was learned on is gi0/2 which is right because the path from SW2's perspective to get to the server is via SW1 to SW3. 

Jon