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.