Network+ Diagnosing Routing and Switching Issues Quiz

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| Questions: 20 | Updated: Aug 12, 2026
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1. A switch shows excessive unicast flooding. What is the likely cause?

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About This Quiz
Network+ Diagnosing Routing and Switching Issues Quiz - Quiz

This quiz evaluates your ability to diagnose and resolve routing and switching issues in enterprise networks. You'll test your knowledge of VLANs, routing protocols, spanning tree, port configurations, and common troubleshooting methodologies. Essential for Network+ certification candidates and IT professionals managing network infrastructure.

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2. An OSPF neighbor relationship fails to establish. What is the first thing to check?

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3. Which protocol dynamically assigns switch ports to VLANs based on MAC address?

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4. A router receives multiple equal-cost routes to the same destination. What does it do?

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5. Which command checks if a port is a trunk or access port on a switch?

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6. A static route is not appearing in the routing table despite correct configuration. Why?

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7. Which statement about RSTP (Rapid Spanning Tree) is correct?

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8. A trunk link between two switches is down. What should you verify first?

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9. You need to verify if a router is forwarding packets correctly. Which command shows active routes?

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10. Which OSI layer does a Layer 3 switch primarily operate on?

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11. Which command displays the MAC address table on a Cisco switch to verify learned addresses?

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12. What is the primary purpose of the 'debug ip routing' command?

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13. Which symptom indicates a duplex mismatch on a network interface?

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14. An access point on VLAN 50 cannot communicate with devices on VLAN 60. What is needed?

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15. Which command verifies VLAN membership on a Cisco switch port?

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16. A ping to a remote subnet succeeds but tracert shows timeout at hop 3. What could be the issue?

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17. Which routing protocol uses hop count as its metric?

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18. You notice a router interface shows 'down/down' status. Which issue is most likely?

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19. What does STP (Spanning Tree Protocol) prevent in switched networks?

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20. A switch port is stuck in disabled state. Which command enables it on a Cisco device?

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A switch shows excessive unicast flooding. What is the likely cause?
An OSPF neighbor relationship fails to establish. What is the first...
Which protocol dynamically assigns switch ports to VLANs based on MAC...
A router receives multiple equal-cost routes to the same destination....
Which command checks if a port is a trunk or access port on a switch?
A static route is not appearing in the routing table despite correct...
Which statement about RSTP (Rapid Spanning Tree) is correct?
A trunk link between two switches is down. What should you verify...
You need to verify if a router is forwarding packets correctly. Which...
Which OSI layer does a Layer 3 switch primarily operate on?
Which command displays the MAC address table on a Cisco switch to...
What is the primary purpose of the 'debug ip routing' command?
Which symptom indicates a duplex mismatch on a network interface?
An access point on VLAN 50 cannot communicate with devices on VLAN 60....
Which command verifies VLAN membership on a Cisco switch port?
A ping to a remote subnet succeeds but tracert shows timeout at hop 3....
Which routing protocol uses hop count as its metric?
You notice a router interface shows 'down/down' status. Which issue is...
What does STP (Spanning Tree Protocol) prevent in switched networks?
A switch port is stuck in disabled state. Which command enables it on...
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