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200-901 Practice Question: Which TWO of the following are valid reasons to…
Which TWO of the following are valid reasons to use a trunk link between two switches? (Select exactly two.)
⚠ Common exam trap
Cisco often tests the distinction between trunking (VLAN tagging) and link aggregation (EtherChannel), so candidates mistakenly select 'increase bandwidth' as a trunk benefit when it is actually a feature of EtherChannel.
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
✓
To interconnect switches in a multi-VLAN environment.
Trunk links are specifically designed to interconnect switches in a multi-VLAN environment, allowing the switches to exchange frames tagged with VLAN information using the 802.1Q protocol. Without a trunk, each VLAN would require a separate physical link between switches, which is inefficient and does not scale.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To connect a switch to a router using a single link for one VLAN.
Why it's wrong here
A single VLAN can use an access port; trunk is unnecessary.
- ✗
To increase bandwidth between switches by combining multiple links.
Why it's wrong here
That is Link Aggregation (EtherChannel), not trunking.
- ✗
To reduce latency by using 802.1Q encapsulation.
Why it's wrong here
Trunking does not inherently reduce latency.
- ✓
To interconnect switches in a multi-VLAN environment.
Why this is correct
Trunks are standard for switch-to-switch connections carrying multiple VLANs.
- ✓
To allow traffic from multiple VLANs to traverse a single link.
Why this is correct
Trunking enables multiple VLANs over one link.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.