Again referring to Figure 5-22 and Example 5-8, can Station C communicate with Station D?
No. Although Stations C and D belong to the same logical network and the same VLAN, there is no connectivity between the switches for VLAN 2. Note that, on Cat-A, one inter-switch port belongs to VLAN 1 and the other to VLAN 2. But for Cat-B, neither of the inter-switch ports belong to VLAN 2. This prevents any VLAN 2 traffic from passing between the Catalysts.