Question 109 of 2,015

VLANs and Trunking →mediumMatchingObjective-mapped

Quick Answer

The correct match is VLANs 1002–1005 reserved for legacy token ring and FDDI, because the Cisco switch VLAN database divides ranges into three categories: normal VLANs (1–1005), extended VLANs (1006–4094), and reserved VLANs (0, 1002–1005, and 4095). VLANs 1002 through 1005 are specifically set aside for backward compatibility with older token ring and Fiber Distributed Data Interface networks, and they cannot be deleted or reassigned. On the ENCOR 350-401 exam, this drag-and-drop task tests your precise knowledge of VLAN ranges, often trapping candidates who mistakenly think all VLANs from 1 to 1005 are normal or that extended VLANs start at 1001. A common memory tip is to remember that the “reserved” range is the odd one out: 1002–1005 are the only VLANs that are both within the normal range yet reserved for legacy protocols, so think “2 through 5 are token ring and FDDI survivors.”

350-401 VLANs and Trunking Practice Question

This 350-401 practice question tests your understanding of vlans and trunking. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Drag and drop each VLAN range on the left to its matching type on the right.

Question 1mediummatching

Open the full VLAN trunking answer →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

1–1005: Normal VLANs

VLANs 1–1005 are normal VLANs, 1006–4094 are extended VLANs, and 0, 4095 are reserved. VLANs 1002–1005 are reserved for legacy token ring and FDDI.

Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.

Common exam traps

Common exam trap: an active trunk can still block the VLAN you need

A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.

Detailed technical explanation

How to think about this question

VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.

KKey Concepts to Remember

Access ports place end devices into a single VLAN.
Trunk ports carry multiple VLANs between switches.
Allowed VLAN lists decide which VLANs can cross a trunk.
Native VLAN mismatch can create confusing symptoms.

TExam Day Tips

Use show vlan brief to verify access VLANs.
Use show interfaces trunk to verify trunk state and allowed VLANs.
Do not treat every same-VLAN issue as a routing problem.

Key takeaway

A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.

Real-world example

How this comes up in practice

A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.

What to study next

Got this wrong? Here's your next step.

Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 350-401 questions on switching, trunking, and access-port configuration.

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FAQ

Questions learners often ask

What does this 350-401 question test?

VLANs and Trunking — This question tests VLANs and Trunking — Access ports place end devices into a single VLAN..

What is the correct answer to this question?

The correct answer is: 1–1005: Normal VLANs — VLANs 1–1005 are normal VLANs, 1006–4094 are extended VLANs, and 0, 4095 are reserved. VLANs 1002–1005 are reserved for legacy token ring and FDDI.

What should I do if I get this 350-401 question wrong?

What is the key concept behind this question?

Access ports place end devices into a single VLAN.

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Same concept, more angles

1 more ways this is tested on 350-401

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. Drag and drop each VLAN range on the left to its matching type on the right.

medium

✓ P1.1–1005: Normal range VLANs
✓ P2.1006–4094: Extended range VLANs
✓ P3.0, 4095: Reserved VLANs (cannot be used)
✓ P4.1002–1005: Default FDDI and Token Ring VLANs
✓ P5.1: Default Ethernet VLAN

Why P1: VLANs 1–1005 are normal range, 1006–4094 extended, 0 and 4095 reserved, 1002–1005 are default token ring/FDDI VLANs, and 1 is the default Ethernet VLAN.

Last reviewed: Jun 18, 2026

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