Which switch provides the spanning-tree designated port role for the network segment that
services the printers?
A.
Switch1
B.
Switch2
C.
Switch3
D.
Switch4
Explanation:
First, the question asks what switch services the printers, so it can be Switch 3 or Switch 4 which
is connected directly to the Printers.
Designated port is a port that is in the forwarding state. All ports of the root bridge are designated
ports.
Switch 3 and Switch 4 has same priority so it will see on lowest MAC address and here switch 3
has lowest MAC address. So switch 3 segment will play a Designated port role.
By comparing the MAC address of Switch 3 and Switch 4 we found that the MAC of Switch 3 is
smaller. Therefore the interface connected to the Printers of Switch 3 will become designated
interface and the interface of Switch 4 will be blocked.