How many Show Command Output Questions questions are on this page?

This page has 6 Show Command Output Questions scenario questions for the 350-601 exam, each with detailed explanations and wrong-answer analysis.

How should I approach 350-601 scenario questions?

Read the full scenario before looking at the answer options. Identify the constraint or requirement in the scenario, then eliminate options that are generally true but wrong for this specific case. Scenario questions reward careful reading over pattern matching.

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Show Command Output Questions

Practise Cisco DCCOR / CCNP Data Center Core 350-601 practice questions — original exam-style scenarios covering every exam domain, with detailed explanations, wrong-answer analysis, and common exam traps.

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scenario questions

350-601

exam code

Cisco

vendor

Scenario guide

How to approach show command output questions

These questions present the output of IOS show commands — show ip route, show interfaces, show ip ospf neighbor, show vlan brief — and ask you to interpret what they reveal about the network state. Reading IOS output accurately is one of the highest-value skills on the CCNA.

Quick answer

Show Command Output Questions questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Practice scenarios

Question 1mediummultiple choice

Open the full VLAN trunking answer →

Refer to the exhibit. An automation script is used to configure a new VLAN 40 on Eth1/2 trunk. The script sends the following NX-API command: 'switchport trunk allowed vlan add 40'. After execution, the engineer runs 'show running-config interface eth1/2' and sees that the trunk allowed VLAN list shows '10,20,30,40'. However, the automation script logs indicate success for adding VLAN 40, but the running config does not show the change. What is the most likely issue?

Exhibit

Refer to the exhibit.

interface Eth1/1
  description Server-Connection
  switchport mode access
  switchport access vlan 100
  spanning-tree port type edge
  no shutdown

interface Eth1/2
  description Trunk-to-Core
  switchport mode trunk
  switchport trunk allowed vlan 10,20,30
  spanning-tree port type network
  no shutdown

A
The command syntax is incorrect; 'add' is not a valid keyword.
Why wrong: The 'add' keyword is valid for adding VLANs to the allowed list.
B
The engineer is viewing a different switch or the configuration was reverted by another process.
The running config shows the change, so the issue is likely that the engineer is looking at the wrong device or the config was changed after.
C
The script actually removed the existing VLANs and replaced them with only VLAN 40.
Why wrong: The running config shows the list includes all VLANs, so it was not replaced.
D
The NX-API command was sent to the wrong interface.
Why wrong: The command targeted Eth1/2, and the running config shows that interface.

Full breakdown with real-world context →

Question 2hardmulti select

Full question →

An engineer is troubleshooting a performance issue on a Cisco MDS 9700 switch. The 'show interface fc1/1' output shows CRC errors incrementing slowly. The interface is connected to a storage array. Which two actions should the engineer take to resolve the issue?

A
Increase the MTU size on the interface.
Why wrong: MTU affects frame size but not CRC errors.
B
Replace the fiber optic cable and SFP.
Faulty cables or SFPs are common causes of CRC errors.
C
Enable BB_credit recovery on the interface.
BB_credit recovery helps manage buffer credit issues that can cause CRC errors.
D
Clear the interface counters.
Why wrong: Clearing counters hides the problem without resolving it.
E
Change the interface speed from auto to a fixed value.
Why wrong: Speed mismatch is less likely; fixing speed may cause other issues.

Full breakdown with real-world context →

Question 3mediummultiple choice

Full question →

An engineer is troubleshooting a SAN performance issue. The show interface counters command shows high output discard counts on a particular Fibre Channel interface. What is the most likely cause?

A
High CRC errors on the link.
Why wrong: CRC errors are input errors, not output discards.
B
Insufficient buffer credits on the transmitting port.
Output discards happen when the port runs out of buffer credits.
C
Insufficient bandwidth due to latency.
Why wrong: Latency can cause buffer credit starvation, but the direct cause is lack of credits.
D
Mismatched zone configurations.
Why wrong: Zoning mismatch prevents communication, but does not cause output discards.

Full breakdown with real-world context →

Question 4hardmultiple choice

Full question →

An FCoE link between a Nexus switch and a storage array fails to come up. The switch is configured as an FCF. The administrator runs 'show interface ethernet 1/1' and sees the interface is up/up. Which command will most likely reveal the root cause?

A
show vlan id 100
Why wrong: Incorrect: VLAN existence is necessary but not sufficient.
B
show lldp neighbors interface ethernet 1/1
Why wrong: Incorrect: LLDP neighbor shows device but not FCoE status.
C
show fcoe database
Correct: Shows FCoE session and VLAN status.
D
show spanning-tree interface ethernet 1/1
Why wrong: Incorrect: Spanning tree does not affect FCoE.

Full breakdown with real-world context →

Question 5mediummultiple choice

Study the full Python automation breakdown →

A Python script using the pyATS framework to parse 'show interface' output on a Nexus 9000 switch fails with a parsing error, even though the CLI command runs successfully. What is the most likely missing component?

A
The script does not include the correct authentication method.
Why wrong: Authentication failure would prevent the CLI command from running at all, not cause a parse error.
B
The Genie parser for the specific NX-OS version is not installed or imported.
pyATS uses Genie parsers that are version-specific; missing parser leads to parse error.
C
The script uses the wrong device type (e.g., iosxe instead of nxos).
Why wrong: Wrong device type would cause connection issues, but not specifically a parsing error after successful command execution.
D
The switch is not configured with NETCONF.
Why wrong: pyATS works over CLI (ssh) and does not require NETCONF for parsing show commands.

Full breakdown with real-world context →

Question 6mediummultiple choice

Open the full VLAN trunking answer →

A company is consolidating its storage network into a single fabric using a Cisco MDS 9509. They want to use VSANs to isolate different departments. The VSANs will be 10, 20, and 30. They have a single ISL between two MDS switches. The engineers want to carry all three VSANs over the ISL. They configure both ends of the ISL as E ports and enable trunking. After configuration, they notice that only VSAN 10 traffic passes over the ISL. The other VSANs appear isolated. The show vsan membership shows all three VSANs are present on both switches. The show interface trunk on the ISL shows that the trunk is up but only VSAN 10 is allowed. What is the most likely cause?

A
The other VSANs are not configured on the trunk interface
Why wrong: VSANs are configured switch-wide, not per interface.
B
The allowed VSAN list on the trunk port is limited to only VSAN 10
The allowed VSAN list must be explicitly configured to include VSAN 20 and 30.
C
The trunk mode is set to 'on' instead of 'desirable'/'auto'
Why wrong: Trunk mode 'on' enables trunking but does not restrict allowed VSANs.
D
The ISL is in an error-disabled state for VSAN 20 and 30
Why wrong: Error-disable would prevent traffic on those VSANs, but the trunk status shows only VSAN allowed.

Full breakdown with real-world context →

These 350-601 practice questions are part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style 350-601 questions with detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics.

Show Command Output Questions

How to approach show command output questions

Quick answer

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Practice scenarios

Exhibit

An engineer is troubleshooting a performance issue on a Cisco MDS 9700 switch. The 'show interface fc1/1' output shows CRC errors incrementing slowly. The interface is connected to a storage array. Which two actions should the engineer take to resolve the issue?

An engineer is troubleshooting a SAN performance issue. The show interface counters command shows high output discard counts on a particular Fibre Channel interface. What is the most likely cause?

An FCoE link between a Nexus switch and a storage array fails to come up. The switch is configured as an FCF. The administrator runs 'show interface ethernet 1/1' and sees the interface is up/up. Which command will most likely reveal the root cause?

A Python script using the pyATS framework to parse 'show interface' output on a Nexus 9000 switch fails with a parsing error, even though the CLI command runs successfully. What is the most likely missing component?