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This page has 5 Show Command Output Questions scenario questions for the 350-501 exam, each with detailed explanations and wrong-answer analysis.

How should I approach 350-501 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 SPCOR / CCNP Service Provider Core 350-501 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

350-501

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Cisco

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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 1easymultiple choice

Open the full BGP breakdown →

In a Layer 3 MPLS VPN, a customer site that is part of VRF RED is unable to communicate with another site that is also in VRF RED. The 'show ip bgp vpnv4 vrf RED' command shows the routes, but the router does not install them in the routing table. Which configuration element is most likely missing?

A
A BGP session between PEs.
Why wrong: Incorrect. BGP session exists if routes are visible in 'show ip bgp vpnv4'.
B
The route-target export on the receiving PE.
Why wrong: Incorrect. Export is for routes sent from this PE.
C
The route-target import on the receiving PE.
Correct. Import is needed to accept routes into the VRF.
D
An MPLS LDP session between PEs.
Why wrong: Incorrect. LDP is for label distribution, not for VRF route installation.

Full breakdown with real-world context →

Question 2hardmultiple choice

Study the full multicast explanation →

During multicast troubleshooting, the command 'show ip mroute' shows that the RPF neighbor for a particular (S,G) entry is incorrect. What is the most likely cause?

A
The unicast routing table does not have a route back to the source.
RPF check uses unicast route towards source; missing or incorrect route leads to wrong RPF neighbor.
B
The multicast routing protocol is not enabled globally.
Why wrong: If not enabled, no multicast entries would exist.
C
TTL threshold is set too high on the incoming interface.
Why wrong: TTL threshold would drop packets, not affect RPF neighbor.
D
IGMP snooping is disabled on the switch.
Why wrong: IGMP snooping is layer 2; does not affect RPF on routers.

Full breakdown with real-world context →

Question 3hardmultiple choice

Open the full BGP breakdown →

An engineer is troubleshooting an MPLS VPN issue where CE1 cannot ping CE2 across the provider network. The PE routers are configured with MP-BGP and LDP. On PE1, 'show ip bgp vpnv4 vrf CUST' shows the route to CE2's loopback as valid, but 'show mpls forwarding-table' does not list a label for that prefix. What is the most likely cause?

A
MTU mismatch on the MPLS core interfaces
Why wrong: MTU issues cause packet drops, not missing label entries.
B
LDP is not enabled on the core link between PE1 and P
Why wrong: LDP is needed for transport labels, but the issue is about VPN label in forwarding table.
C
Route target mismatch between PE1 and PE2
Incorrect RT prevents the VPN label from being installed in the forwarding table despite BGP advertisement.
D
BGP session between PE1 and PE2 is not established
Why wrong: If BGP session is down, the route would not appear in 'show ip bgp vpnv4'.

Full breakdown with real-world context →

Question 4hardmultiple choice

Review the full OSPF breakdown →

A network operator is deploying Segment Routing with TI-LFA across an OSPF network. After configuring OSPF with 'segment-routing mpls' and 'fast-reroute per-prefix', they notice that backup paths are not being installed for some prefixes. 'Show ip ospf segment-routing protected' shows 'No FRR backup' for those prefixes. What is a possible reason?

A
LDP label distribution is still active
Why wrong: LDP is not required for TI-LFA in SR.
B
The prefix-SID index is not globally unique
Why wrong: Global uniqueness affects label assignment, not backup path computation.
C
OSPF does not support TI-LFA for per-prefix prefixes
Why wrong: OSPF does support TI-LFA.
D
Adjacency-SIDs are not configured on neighboring routers
TI-LFA uses adjacency-SIDs to create the repair path.

Full breakdown with real-world context →

Question 5hardmultiple choice

Review the full OSPF breakdown →

A service provider is experiencing intermittent multicast issues in their core network. They use PIM-SM with a static RP at 10.1.1.1. The multicast traffic originates from a source connected to PE1 and is received by customers connected to PE2. Recently, after a firewall upgrade between the PE routers and the core, some multicast streams stopped working, while others continue. The network team notices that 'show ip mroute' on PE2 shows the (*, G) entry but not the (S, G) entry for the affected groups. The RP is reachable via OSPF. The firewall logs show no dropped packets for known multicast addresses. Which action should the engineer take to restore full multicast forwarding?

A
Increase the PIM register suppression interval on the source's first-hop router
Why wrong: This would only delay re-registration, not solve the root cause of the register not reaching the RP.
B
Configure a static RP at the customer site (PE2) to bypass the firewall for registration traffic
A static RP on PE2 ensures that the source's registration reaches the RP even if the firewall blocks unicast PIM register messages. This allows the (S,G) to be formed.
C
Change the multicast mode from PIM-SM to PIM-DM on all interfaces
Why wrong: PIM-DM uses flood-and-prune and would not solve the RP registration issue; it would also be inefficient for a sparse group.
D
Enable Auto-RP on the network to dynamically learn the RP
Why wrong: Auto-RP uses multicast advertisements that may also be blocked by the firewall, and it does not address the immediate issue of lost registrations.

Full breakdown with real-world context →

These 350-501 practice questions are part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style 350-501 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

In a Layer 3 MPLS VPN, a customer site that is part of VRF RED is unable to communicate with another site that is also in VRF RED. The 'show ip bgp vpnv4 vrf RED' command shows the routes, but the router does not install them in the routing table. Which configuration element is most likely missing?

During multicast troubleshooting, the command 'show ip mroute' shows that the RPF neighbor for a particular (S,G) entry is incorrect. What is the most likely cause?