mediumMultiple ChoiceObjective-mapped
CCNP Practice Question: Examine the following partial Cisco IOS-XE…
Examine the following partial Cisco IOS-XE configuration:
interface GigabitEthernet0/1 switchport mode access switchport access vlan 10 ip access-group ACL_IN in spanning-tree portfast
What is the effect of this configuration?
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
✓
The port will immediately transition to forwarding state, reducing STP convergence time for end hosts.
The configuration enables PortFast on an access port, allowing it to transition directly to forwarding state, bypassing the listening and learning phases. This is commonly used for end-host ports to avoid delays caused by spanning-tree convergence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The port will immediately transition to forwarding state, reducing STP convergence time for end hosts.
Why this is correct
spanning-tree portfast on an access port causes immediate forwarding, as intended for host ports.
- ✗
The port will become a trunk port and participate in VLAN trunking.
Why it's wrong here
The port is configured as an access port, not a trunk.
- ✗
The port will use Rapid PVST+ and immediately forward after a link failure.
Why it's wrong here
PortFast does not change the STP mode; it only affects initial convergence.
- ✗
The port will block all inbound traffic due to the ACL.
Why it's wrong here
The ACL is applied inbound but does not block all traffic; it filters based on the ACL entries.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 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 350-401 exam.