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Network Virtualization Flashcards

6 cards from real Cisco ENCOR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Network Virtualization flashcards as text

  1. Which protocol is used as the data plane encapsulation in VXLAN overlays?

    Answer: UDP

    VXLAN encapsulates Layer 2 frames inside UDP packets, using destination port 4789 by default.

  2. What is the VXLAN Network Identifier (VNI) field size?

    Answer: 24 bits

    The VNI is a 24-bit field, allowing up to 16 million unique overlay segments.

  3. In a Cisco SD-WAN fabric, which component is responsible for centralized policy and management?

    Answer: vManage

    vManage is the centralized NMS/orchestrator for Cisco SD-WAN, handling policy, monitoring, and configuration.

  4. Which Cisco SD-WAN component acts as the orchestrator and facilitates initial authentication of WAN Edge routers?

    Answer: vBond

    vBond is the orchestration plane component that authenticates and redirects WAN Edge devices to vSmart and vManage.

  5. What technology does LISP use to separate host identity from its location?

    Answer: EID and RLOC

    LISP separates the Endpoint Identifier (EID) from the Routing Locator (RLOC) to enable scalable mobility.

  6. Which plane in an SD-WAN architecture distributes OMP routing information between WAN Edge devices?

    Answer: vSmart (control plane)

    vSmart controllers form the control plane, running OMP to distribute routing, policy, and key information to WAN Edge routers.

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  1. cisco.com — Eligibility, renewal, score validity, test delivery, fees, time limit · verified Oct 2026