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350-401 Practice Question: Which three statements about EtherChannel…
Which three statements about EtherChannel configuration and verification are true? (Choose three.)
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
✓
All member ports in an EtherChannel must have the same speed and duplex settings.
EtherChannel configuration requires consistent settings across member ports (speed, duplex, VLAN, trunking). The 'show etherchannel summary' command displays the state (SU for Layer 2 in use, P for bundled). The 'on' mode forces the channel without negotiation. Misconfigurations can cause the channel to not form or to flap.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
All member ports in an EtherChannel must have the same speed and duplex settings.
Why this is correct
Correct because mismatched speed or duplex will prevent the channel from being established.
- ✗
The 'channel-group 1 mode on' command enables LACP negotiation on the interface.
Why it's wrong here
Incorrect because 'mode on' forces the channel without any negotiation protocol (neither LACP nor PAgP).
- ✓
The command 'show etherchannel summary' displays the port-channel interface status and which member ports are bundled.
Why this is correct
Correct because this command provides a concise view of the EtherChannel, including the 'SU' (Layer 2 up) and 'P' (bundled) flags.
- ✗
If a member link is configured as a trunk but the port-channel interface is an access port, the channel will still form.
Why it's wrong here
Incorrect because all member ports must have the same Layer 2 mode (all trunk or all access) to form a channel.
- ✓
When using LACP, the 'lacp rate fast' command reduces the interval for sending LACPDUs from 30 seconds to 1 second.
Why this is correct
Correct because fast rate sets the LACPDU interval to 1 second, speeding up convergence.
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Same concept, more angles
1 more way this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which two statements about EtherChannel configuration and verification are true? (Choose two.)
hard- ✓ A.On IOS-XE, the 'channel-group 1 mode active' command creates the port-channel interface automatically if it does not exist.
- ✓ B.The 'show etherchannel load-balance' command displays the current load-balancing method and the hash algorithm used.
- C.In a Layer 3 EtherChannel, you must assign an IP address to the port-channel interface and also to each member interface.
- D.The 'channel-group 1 mode desirable' command is valid on both IOS-XE and NX-OS platforms.
- E.If physical ports in an EtherChannel have different speed or duplex settings, the EtherChannel will still form but with reduced bandwidth.
Why A: EtherChannel interfaces can be configured as Layer 2 (switchport) or Layer 3 (no switchport). The 'channel-group' command assigns a physical port to a port-channel. The 'show etherchannel summary' command displays the state and bundle information. On NX-OS, the 'channel-group' command uses the 'force' option to override mismatched parameters.
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.