CCNA Switching and Network Access Practice Question
Which VLAN is used by default for most switch ports on a new Cisco switch?
⚠ Common exam trap
Remember that VLAN 1 is the default VLAN on Cisco switches, despite being discouraged for use in production environments.
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
✓
VLAN 1
On a default Cisco switch, access ports belong to VLAN 1 until changed. Best practice is usually to move user ports away from VLAN 1, but the default is still VLAN 1.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
VLAN 1
Why this is correct
On a new Cisco switch, every port is automatically placed in VLAN 1, which is the factory-default VLAN and cannot be deleted or renamed. This default assignment applies to both access and trunk ports, and VLAN 1 also serves as the default native VLAN. Therefore, VLAN 1 is the correct answer for the default switch port VLAN.
- ✗
VLAN 99
Why it's wrong here
VLAN 99 is a common administrative choice for management or native VLANs, but it is not the default on any Cisco switch. To use VLAN 99, an administrator must manually create it and then assign it to ports or use it on a trunk. Since a new switch has no such custom VLAN configured, its default port membership remains VLAN 1.
When this WOULD be correct
If the question specified a scenario where a network administrator had configured VLAN 99 as the default VLAN for all switch ports on a custom setup, then VLAN 99 would be the correct answer. This could occur in a lab exam focusing on customized VLAN configurations.
- ✗
VLAN 1002
Why it's wrong here
VLAN 1002 is one of the reserved legacy VLANs used for FDDI and Token Ring media types, not for standard Ethernet switch ports. These reserved VLANs exist in the switch's VLAN database but are not assignable to normal access or trunk ports. Consequently, a new switch port would never default to VLAN 1002.
When this WOULD be correct
If the exam question asked which VLAN is reserved for legacy protocols like Token Ring or FDDI, then VLAN 1002 would be the correct answer. In this scenario, the question would focus on VLAN assignments specific to older network technologies.
- ✗
No VLAN until the port is manually assigned
Why it's wrong here
Cisco switch ports do not remain in an unassigned state; every port is immediately placed into VLAN 1 when the switch initializes. Even if the port is administratively shutdown or the switch lacks a saved configuration, the VLAN 1 membership is inherent. Thus, a port is never without a VLAN until manually configured.
When this WOULD be correct
If the question were to ask about the default behavior of a switch port that has not been configured or assigned a VLAN, then stating 'No VLAN until the port is manually assigned' would be correct. This would imply a scenario where the switch is in a factory default state and no VLAN configuration has been applied.
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.
✓VLAN 1Correct answer▾
Why this is correct
On a new Cisco switch, every port is automatically placed in VLAN 1, which is the factory-default VLAN and cannot be deleted or renamed. This default assignment applies to both access and trunk ports, and VLAN 1 also serves as the default native VLAN. Therefore, VLAN 1 is the correct answer for the default switch port VLAN.
✗VLAN 99Wrong answer — click to see why▾
Why this is wrong here
VLAN 99 is not the default VLAN for switch ports on a new Cisco switch; the default is VLAN 1. VLAN 99 is often used in specific configurations but is not the factory default setting.
★ When this WOULD be the correct answer
If the question specified a scenario where a network administrator had configured VLAN 99 as the default VLAN for all switch ports on a custom setup, then VLAN 99 would be the correct answer. This could occur in a lab exam focusing on customized VLAN configurations.
Why candidates choose this
Candidates may choose VLAN 99 because it is commonly referenced in discussions about VLAN management and security practices, leading to confusion about default settings versus user-defined configurations.
✗VLAN 1002Wrong answer — click to see why▾
Why this is wrong here
VLAN 1002 is a reserved VLAN for Token Ring and FDDI, and it is not the default VLAN for switch ports on a new Cisco switch. Most switch ports default to VLAN 1 unless configured otherwise.
★ When this WOULD be the correct answer
If the exam question asked which VLAN is reserved for legacy protocols like Token Ring or FDDI, then VLAN 1002 would be the correct answer. In this scenario, the question would focus on VLAN assignments specific to older network technologies.
Why candidates choose this
Candidates may choose VLAN 1002 due to familiarity with VLAN numbering and the assumption that it could be a default VLAN, especially if they recall it being mentioned in discussions about VLANs in general networking contexts.
✗No VLAN until the port is manually assignedWrong answer — click to see why▾
Why this is wrong here
This option is incorrect because, by default, Cisco switches assign all ports to VLAN 1, not leaving them unassigned. Every port is part of VLAN 1 unless configured otherwise.
★ When this WOULD be the correct answer
If the question were to ask about the default behavior of a switch port that has not been configured or assigned a VLAN, then stating 'No VLAN until the port is manually assigned' would be correct. This would imply a scenario where the switch is in a factory default state and no VLAN configuration has been applied.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of VLAN assignments, thinking that ports remain unassigned until explicitly configured, especially if they are familiar with other networking devices that might operate differently.
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?”
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Related to this question
Learn chapter
Configuring Switch Ports for Desktops, VoIP Phones, APs, IoT, and Virtualized Hosts
Key term
VLAN
A VLAN (Virtual Local Area Network) is a logical grouping of network devices that behave as if they are on the same physical network segment, regardless of their actual physical location.
Key term
Switch
A switch is a networking device that connects devices on a local area network and uses MAC addresses to forward data only to the intended recipient.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 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 200-301 exam.