The answer is that the switch will wait 30 seconds before sending a new EAPOL-Start after a failed authentication. This is because the `dot1x timeout quiet-period` command directly controls the quiet-period timer, which defines the number of seconds a 802.1X authenticator (the switch) must remain silent after an authentication failure before it can re-initiate the process with a new EAPOL-Start frame. On the ENCOR 350-401 exam, this command tests your understanding of 802.1X timers and their impact on network access control behavior; a common trap is confusing the quiet-period with the tx-period (which controls how often EAPOL-Start is sent when no client is detected). Remember that a failed authentication triggers a "timeout" of silence, and lowering the value from the default 60 seconds to 30 seconds speeds up re-authentication attempts. A useful memory tip: "Quiet means wait after a fail—lower the number to retry without a long trail."
350-401 802.1X and TrustSec Practice Question
This 350-401 practice question tests your understanding of 802.1x and trustsec. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Examine the following configuration:
aaa new-model
aaa authentication dot1x default group radius
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The switch will wait 30 seconds before sending a new EAPOL-Start after a failed authentication.
The quiet-period timer defines the number of seconds the switch waits after a failed authentication attempt before re-initiating authentication. The default is 60 seconds; here it is set to 30 seconds.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 switch will wait 30 seconds before sending a new EAPOL-Start after a failed authentication.
Why this is correct
The quiet-period timer controls the delay after a failure before the authenticator retries.
Related concept
Authentication checks who the user is.
✗
The switch will wait 30 seconds for a response from the supplicant before timing out.
Why it's wrong here
That is the tx-period timer, not quiet-period.
✗
The switch will wait 30 seconds before placing the port in the unauthorized state after a link up event.
Why it's wrong here
That behavior is controlled by the 'authentication timer' commands.
✗
The switch will wait 30 seconds for the RADIUS server to respond before failing authentication.
Why it's wrong here
That is the server timeout, not quiet-period.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Trap categories for this question
Command / output trap
That behavior is controlled by the 'authentication timer' commands.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 350-401 question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 350-401 questions on access control and AAA configuration.
802.1X and TrustSec — This question tests 802.1X and TrustSec — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: The switch will wait 30 seconds before sending a new EAPOL-Start after a failed authentication. — The quiet-period timer defines the number of seconds the switch waits after a failed authentication attempt before re-initiating authentication. The default is 60 seconds; here it is set to 30 seconds.
What should I do if I get this 350-401 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 350-401 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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