- A
Access port: A switch port that belongs to a single VLAN and carries untagged traffic for that VLAN.
This is correct because an access port is assigned to one VLAN and forwards frames without a VLAN tag, assuming the native VLAN of the port.
- B
Trunk port: A switch port that carries traffic for multiple VLANs and uses 802.1Q tagging to identify each frame's VLAN.
Why wrong: This is incorrect because the description is actually correct for a trunk port, but the question asks for the term that matches 'Access port' meaning. The correct match for this description is 'Trunk port', not 'Access port'.
- C
VLAN: A logical grouping of devices that are on the same broadcast domain, regardless of physical location.
Why wrong: This is incorrect because while the description is accurate for a VLAN, the question asks for the term that matches 'Access port' meaning. This option defines a VLAN, not an access port.
- D
SVI: A virtual interface on a switch that provides Layer 3 routing for a VLAN.
Why wrong: This is incorrect because an SVI (Switch Virtual Interface) is a Layer 3 interface used for routing, not a description of an access port. The question asks for the meaning of 'Access port', not 'SVI'.
CCNA Switching and Network Access Practice Question
This 200-301 practice question tests your understanding of switching and network access. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: an access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers.. 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.
Match each switchport or VLAN term to its most accurate meaning.
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
Access port: A switch port that belongs to a single VLAN and carries untagged traffic for that VLAN.
Access ports are in one VLAN; trunk ports carry multiple VLANs with tags. Switchport mode commands set the port type. VLANs create separate broadcast domains; SVIs provide Layer 3 routing for VLANs.
Key principle: An access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Access port: A switch port that belongs to a single VLAN and carries untagged traffic for that VLAN.
Why this is correct
This is correct because an access port is assigned to one VLAN and forwards frames without a VLAN tag, assuming the native VLAN of the port.
Related concept
An access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers.
- ✗
Trunk port: A switch port that carries traffic for multiple VLANs and uses 802.1Q tagging to identify each frame's VLAN.
Why it's wrong here
This is incorrect because the description is actually correct for a trunk port, but the question asks for the term that matches 'Access port' meaning. The correct match for this description is 'Trunk port', not 'Access port'.
- ✗
VLAN: A logical grouping of devices that are on the same broadcast domain, regardless of physical location.
Why it's wrong here
This is incorrect because while the description is accurate for a VLAN, the question asks for the term that matches 'Access port' meaning. This option defines a VLAN, not an access port.
- ✗
SVI: A virtual interface on a switch that provides Layer 3 routing for a VLAN.
Why it's wrong here
This is incorrect because an SVI (Switch Virtual Interface) is a Layer 3 interface used for routing, not a description of an access port. The question asks for the meaning of 'Access port', not 'SVI'.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓Access port: A switch port that belongs to a single VLAN and carries untagged traffic for that VLAN.Correct answer▾
Why this is correct
This is correct because an access port is assigned to one VLAN and forwards frames without a VLAN tag, assuming the native VLAN of the port.
✗Trunk port: A switch port that carries traffic for multiple VLANs and uses 802.1Q tagging to identify each frame's VLAN.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error: The description accurately defines a trunk port, not an access port. The question expects the term 'Access port' to be matched with its definition.
Why candidates choose this
Candidates pick this because they may confuse the definitions of access and trunk ports, or they might think a trunk port can also be in a single VLAN.
✗VLAN: A logical grouping of devices that are on the same broadcast domain, regardless of physical location.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error: The description correctly defines a VLAN, but the question is about matching the term 'Access port' to its meaning. This option is a distractor that defines a different concept.
Why candidates choose this
Candidates pick this because they may think that an access port is associated with a VLAN, so the definition of a VLAN might seem like a plausible match for 'Access port'.
✗SVI: A virtual interface on a switch that provides Layer 3 routing for a VLAN.Wrong answer — click to see why▾
Why this is wrong here
The specific factual error: The description defines an SVI, which is a routed interface, not a switch port type. Access ports are Layer 2 interfaces.
Why candidates choose this
Candidates pick this because they may confuse the terms 'access port' and 'SVI' as both are associated with VLANs, or they might think an SVI is a type of port.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The exam trap here is confusing the definitions of access ports and trunk ports, or associating an access port with the concept of a VLAN or SVI. Remember that an access port is a Layer 2 port that belongs to exactly one VLAN and does not tag frames.
Detailed technical explanation
How to think about this question
VLANs (Virtual Local Area Networks) segment a physical network into multiple logical networks to improve security and reduce broadcast domains. Switch ports can be configured as access or trunk ports. An access port is assigned to a single VLAN and carries untagged traffic from end devices. In contrast, a trunk port carries traffic for multiple VLANs by tagging frames with VLAN IDs using the IEEE 802.1Q standard. This tagging allows switches to identify which VLAN each frame belongs to as it traverses the trunk link. The native VLAN is a special VLAN on a trunk port that handles untagged frames. By default, Cisco switches use VLAN 1 as the native VLAN, but best practice is to change it to a different VLAN to avoid security risks. The allowed VLAN list on a trunk port controls which VLANs are permitted to send traffic across the trunk, providing a way to limit VLAN propagation and reduce unnecessary traffic. Proper configuration of native VLAN and allowed VLANs is critical to maintain VLAN isolation and prevent VLAN hopping attacks. A common exam trap is confusing access ports with trunk ports or misunderstanding the role of the native VLAN. Access ports do not tag frames and carry only one VLAN, while trunk ports tag frames and carry multiple VLANs. Misconfiguring the native VLAN or allowed VLAN list can lead to untagged traffic being misrouted or VLAN leakage. In practical networks, consistent trunk configuration on both ends and careful native VLAN assignment prevent connectivity issues and security vulnerabilities.
KKey Concepts to Remember
- An access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers.
- A trunk port carries traffic for multiple VLANs simultaneously by tagging frames with VLAN identifiers using the 802.1Q protocol.
- The native VLAN on a trunk port is the VLAN associated with untagged frames, allowing legacy or untagged traffic to be properly handled.
- The allowed VLAN list on a trunk port restricts which VLANs are permitted to traverse that trunk, enhancing security and traffic control.
- Cisco switches use 802.1Q encapsulation to tag VLAN frames on trunk links, except for frames in the native VLAN which remain untagged.
- Misconfiguring the native VLAN or allowed VLAN list on trunks can cause VLAN hopping or traffic leakage between VLANs.
- Access ports do not tag frames with VLAN information; the switch assigns incoming frames to the configured VLAN based on the port.
- Trunk ports must be configured consistently on both ends to ensure proper VLAN tagging and avoid connectivity issues.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
An access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers.
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 an access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers., then practise related 200-301 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this 200-301 question test?
Switching and Network Access — This question tests Switching and Network Access — An access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers..
What is the correct answer to this question?
The correct answer is: Access port: A switch port that belongs to a single VLAN and carries untagged traffic for that VLAN. — Access ports are in one VLAN; trunk ports carry multiple VLANs with tags. Switchport mode commands set the port type. VLANs create separate broadcast domains; SVIs provide Layer 3 routing for VLANs.
What should I do if I get this 200-301 question wrong?
Review an access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
An access port on a Cisco switch carries traffic for exactly one VLAN and is typically used to connect end devices like PCs or printers.
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Last reviewed: Apr 12, 2026
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