CCNA Switching and Network Access Practice Question
Users report that their PCs take over 30 seconds to obtain IP addresses and reach the network after being powered on. A network technician checks a switch port connected to a PC and observes that the port transitions through blocking, listening, learning, and then forwarding states, taking about 30 seconds to complete. The switch is running standard 802.1D STP. The technician confirms the port is an access port and only connects to a PC. What should the technician do next?
⚠ Common exam trap
Cisco often tests the misconception that disabling STP or changing global timers is acceptable for a single access port, when the correct solution is to use PortFast to bypass the STP states safely only on end-host ports.
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
✓
Enable PortFast on the access port.
The 30-second delay is caused by the standard 802.1D STP port states (blocking → listening → learning → forwarding). Since the port is an access port connecting only to a PC (an end host), there is no risk of a bridging loop. Enabling PortFast immediately transitions the port to the forwarding state, bypassing the listening and learning states and eliminating the delay.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reduce the STP forward delay timer globally on the switch.
Why it's wrong here
Lowering the forward delay timer reduces the listening and learning durations for all ports, but it affects the entire switched network and can increase the risk of temporary loops if a topology change occurs. It is not a targeted fix for an edge port and introduces unnecessary instability.
- ✓
Enable PortFast on the access port.
Why this is correct
PortFast is designed for ports that connect to end hosts. It forces the port to transition directly to the forwarding state, skipping the normal STP listening and learning phases, which is exactly what is needed to eliminate the 30-second boot-time delay.
- ✗
Disable STP on the access VLAN assigned to the port.
Why it's wrong here
Disabling STP on a VLAN removes loop prevention entirely, which could cause severe broadcast storms if a loop inadvertently occurs (e.g., a user connects a small switch). This is a dangerous and unsupported approach to solving a delay problem.
- ✗
Enable Rapid PVST+ on the switch.
Why it's wrong here
Upgrading to Rapid PVST+ improves overall convergence speed but does not automatically make an access port skip the learning/listening phases. An edge port still requires the explicit 'spanning-tree portfast' or 'spanning-tree port type edge' command to become a PortFast-enabled port. Without that, the port experience a similar delay.
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.
✓Enable PortFast on the access port.Correct answer▾
Why this is correct
PortFast is designed for ports that connect to end hosts. It forces the port to transition directly to the forwarding state, skipping the normal STP listening and learning phases, which is exactly what is needed to eliminate the 30-second boot-time delay.
✗Reduce the STP forward delay timer globally on the switch.Wrong answer — click to see why▾
Why this is wrong here
This action is too drastic and impacts all ports, whereas the issue is specific to access ports connected to end devices. PortFast is the standard, safe method for eliminating delay on edge ports.
✗Disable STP on the access VLAN assigned to the port.Wrong answer — click to see why▾
Why this is wrong here
Candidates might think that turning off STP on a single VLAN is a quick fix, but it removes the safety net against loops and is not a recommended network practice. PortFast provides the immediate-forwarding benefit while preserving STP loop protection.
✗Enable Rapid PVST+ on the switch.Wrong answer — click to see why▾
Why this is wrong here
Candidates often assume that Rapid PVST+ immediately forwards on all access ports, but the edge port behavior must be configured. The scenario explicitly mentions the port is an access port connected only to a PC; the immediate fix is to enable PortFast, not change the entire STP mode.
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?”
Visual reference
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Related to this question
Learn chapter
Configuring Switch Ports for Desktops, VoIP Phones, APs, IoT, and Virtualized Hosts
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.
Key term
STP
Shielded Twisted Pair (STP) is a copper cable that wraps each twisted pair in foil or braid to block electromagnetic interference.
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JA
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.