🔀 Inter-VLAN Routing - CCNA Practice Questions

Study router-on-a-stick, Layer 3 switching, and SVIs for routing between VLANs. Understand sub-interfaces, trunk links, and when to use each inter-VLAN routing method.

3Questions Available
2Exam Domains

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CCNA Inter-VLAN Routing Question Bank (3 Questions)

Browse all 3 practice questions covering Inter-VLAN Routing for the CCNA certification exam. Each question includes the full answer and a detailed explanation to help you understand the concepts.

  1. Question 1Network Access

    What is the router-on-a-stick configuration used for?

    AConnecting two routers via a serial link
    BPerforming inter-VLAN routing using subinterfaces on a single router interface✓
    CCreating a redundant default gateway
    DConfiguring DHCP relay on a router
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Router-on-a-stick uses a trunk link from a switch to a router with 802.1Q subinterfaces, each assigned to a different VLAN for inter-VLAN routing.

  2. Question 2IP Connectivity

    What is router-on-a-stick and how does it enable inter-VLAN routing?

    AA physical router connected to each VLAN separately
    BA single router interface with subinterfaces, each configured with 802.1Q encapsulation and the gateway IP for its respective VLAN✓
    CA special switch feature
    DA wireless routing method
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Router-on-a-stick: one physical link (trunk) from switch to router. Router creates subinterfaces (GigE0/0.10, GigE0/0.20), each with 'encapsulation dot1q <vlan>' and an IP gateway. The router routes between VLANs. Limitation: single link bandwidth bottleneck. SVI (Layer 3 switch) is preferred.

  3. Question 3Network Access

    Which technology allows inter-VLAN routing using a single physical router interface with multiple sub-interfaces?

    ALayer 3 switching
    BRouter-on-a-stick✓
    CVTP pruning
    DHSRP
    Show Answer & Explanation
    Correct Answer: B
    Explanation:

    Router-on-a-stick uses a single physical interface divided into logical sub-interfaces (e.g., Gi0/0.10, Gi0/0.20), each assigned to a different VLAN with 802.1Q encapsulation. This enables inter-VLAN routing without requiring a separate physical interface per VLAN. Layer 3 switching is a more scalable alternative using SVI interfaces.

Key Inter-VLAN Routing Concepts for CCNA

inter-vlanrouter-on-a-sticksvilayer 3 switchsub-interfacevlan routing

CCNA Inter-VLAN Routing Exam Tips

Inter-VLAN Routing questions in CCNA are typically scenario-based. Focus on service-level decision making aligned to official exam objectives. Priority concepts: inter-vlan, router-on-a-stick, svi, layer 3 switch, sub-interface, vlan routing.

What CCNA Expects

  • Anchor your answer in select the most practical, secure, and scalable answer for the stated scenario.
  • Inter-VLAN Routing scenarios for CCNA are frequently mapped to Domain 2 (20%), Domain 3 (25%), so read the objective carefully before picking controls or architecture.
  • Expect multi-service scenarios where Inter-VLAN Routing interacts with IAM, networking, storage, or observability patterns rather than appearing as an isolated service question.
  • When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Associate) and managed-service best practices.

High-Value Inter-VLAN Routing Concepts

  • Know the core Inter-VLAN Routing building blocks cold: inter-vlan, router-on-a-stick, svi, layer 3 switch.
  • Review the edge-case features and limits for sub-interface, vlan routing; these details are commonly used to differentiate answer choices.
  • Practice service-integration reasoning: how Inter-VLAN Routing pairs with Switching, Routing, IP Addressing in real deployment patterns.
  • For CCNA, explain why the chosen Inter-VLAN Routing design meets reliability, security, and cost expectations better than the alternatives.

Common CCNA Traps

  • Watch for answers that partially solve the requirement but miss operational constraints.
  • Questions in Network Access often include distractors that look correct for Inter-VLAN Routing but violate least-privilege, durability, or availability requirements.
  • Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
  • If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.

Fast Review Checklist

  • Can you compare at least two Inter-VLAN Routing implementation paths and justify which one best fits the scenario?
  • Can you map the chosen answer back to Network Access (20%) outcomes for CCNA?
  • Can you explain security and access boundaries for Inter-VLAN Routing without relying on default-open assumptions?
  • Can you describe how Inter-VLAN Routing integrates with Switching and Routing during failure, scaling, and monitoring events?

Exam Domains Covering Inter-VLAN Routing

Domain 2Network Access20%Domain 3IP Connectivity25%

Related Resources

🎯 Free CCNA Mock Exam📝 Switching Questions📝 Routing Questions📝 IP Addressing Questions

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