MAC spoof concept

[zillah]

I have got these three PCs :

PC1 source (victim) , and PC3 Destination (Target), PC2 attacker (imporsonate idintity of PC1)


PC1 mac address is : 0000.ffff.aaaa
PC2 mac address is : 0000.ffff.bbbb
PC3 mac address is : 0000.ffff.cccc


They are connected to cisco switch 3550

The term MAC spoofing is the creation of frame with a forged (spoofed) source MAC address (our case 0000.ffff.aaaa ) with the purpose to conceal the identity of the sender (our case PC2) and impersonate the identity of PC1.

If PC2 sends traffic to PC3 (Destination) , PC2 will try to masquerades as PC1 by falsifying its MAC address to be 0000.ffff.aaaa, if this the case what would the benefit be for PC2 (attacker), if all the traffic (as a response to initiated connection from PC2) coming back from PC3 go to PC1 instead of PC2 ?

In this simple scenario I do not have DHCP server , I assigned ip address statically