floor-1#configure terminal
floor-1(config)#vlan 200
floor-1(config-vlan)#name VLAN_200
floor-1(config-vlan)#end
floor-1#write

floor-1#show vlan brief

floor-1(config)#interface range Gi1/0/1 - 3
floor-1(config-if-range)#switchport mode access
floor-1(config-if-range)#switchport access vlan 200
floor-1(config-if-range)#no shutdown

floor-1#show running-config interface G1/0/28

floor-1#configure terminal
floor-1(config)#interface G1/0/28
floor-1(config-if)#switchport mode trunk

floor-1#show running-config interface G1/0/24
floor-1#show interfaces trunk