Cisco Exam Questions

Which technique allows specific VLANs to be strictly pe…

Which technique allows specific VLANs to be strictly permitted by the administrator?

A.
VTP pruning

B.
transparent bridging

C.
trunk allowed VLANs

D.
VLAN access-list

E.
L2P tunneling

Explanation:
By default, a trunk port sends traffic to and receives traffic from all VLANs. All VLAN IDs, 1 to 4094, are allowed on each trunk. However, you can remove VLANs
from the allowed list, preventing traffic from those VLANs from passing over the trunk. To restrict the traffic a trunk carries, use the “switchport trunk allowed vlan
remove vlan-list” interface configuration command to remove specific VLANs from the allowed list.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_13_ea1/config uration/guide/swvlan.html