# 300-115 — Question 428

**Type:** multiple_choice
**Topics:** topic_1

## Question

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

## Correct Answer

_See scenario._

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

**Reference:** examtopics_answer_description

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Source: https://hiexam.net/q/cisco/300-115/428  
Practice (tracked): https://hiexam.net/study/300-115/practice