VLANs

Today I saw my BCMSN schedule and I saw that I should have taken my exam already. Unfortunatly, I didn't have time to study (work+personal life) and I'm still at the beggining at the STP chapter.
The first part I have studies, VLAN and VTP was pretty much a review of the knowledge I already had. I would like to emphasize on one of the things I didn't knew that were possible on cisco gear and that is available on almost every other vendor switch (I saw it a lot on HP ProCurve):
SW1(config-if)#switchport trunk allowed vlan ?
WORD VLAN IDs of the allowed VLANs when this port is in trunking mode
add add VLANs to the current list
all all VLANs
except all VLANs except the following
remove remove VLANs from the current list
This command allows us to tag a trunk port to allow only certain VLANs.
It's good to be back!

P.S. I have updated the BCMSN schedule