Practice Virtualization Questions Now
Start a timed practice session focusing on Network Virtualization topics from the ENCOR question bank.
Start ENCOR Practice Quiz →ENCOR Virtualization Question Bank (2 Questions)
Browse all 2 practice questions covering Network Virtualization for the ENCOR certification exam. Each question includes the full answer and a detailed explanation to help you understand the concepts.
- Question 1Virtualization
What is a GRE tunnel and what protocol number does it use?
Show Answer & Explanation
Correct Answer: BExplanation:GRE (Generic Routing Encapsulation): IP protocol 47, encapsulates packets in a new IP header + GRE header. Supports multicast (enables routing protocols over tunnels), multi-protocol (IPv4, IPv6, non-IP). No encryption — often paired with IPsec (GRE over IPsec). Uses: site-to-site connectivity, DMVPN underlay.
- Question 2Virtualization
What additional overhead does GRE tunneling add to a packet?
Show Answer & Explanation
Correct Answer: BExplanation:GRE adds a 20-byte outer IP header plus a 4-byte GRE header (24 bytes minimum). With optional fields like key/sequence, it can be up to 28 bytes.
Key Virtualization Concepts for ENCOR
ENCOR Virtualization Exam Tips
Network Virtualization questions in ENCOR are typically scenario-based. Focus on service-level decision making aligned to official exam objectives. Priority concepts: vrf, gre, ipsec, lisp, vxlan, virtualization.
What ENCOR Expects
- Anchor your answer in select the most practical, secure, and scalable answer for the stated scenario.
- Virtualization scenarios for ENCOR are frequently mapped to Domain 2 (10%), so read the objective carefully before picking controls or architecture.
- Expect multi-service scenarios where Virtualization 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 (Professional) and managed-service best practices.
High-Value Virtualization Concepts
- Know the core Virtualization building blocks cold: vrf, gre, ipsec, lisp.
- Review the edge-case features and limits for vxlan, virtualization; these details are commonly used to differentiate answer choices.
- Practice service-integration reasoning: how Virtualization pairs with Architecture, Infrastructure, Security in real deployment patterns.
- For ENCOR, explain why the chosen Virtualization design meets reliability, security, and cost expectations better than the alternatives.
Common ENCOR Traps
- Watch for answers that partially solve the requirement but miss operational constraints.
- Questions in Virtualization often include distractors that look correct for Virtualization 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 Virtualization implementation paths and justify which one best fits the scenario?
- Can you map the chosen answer back to Virtualization (10%) outcomes for ENCOR?
- Can you explain security and access boundaries for Virtualization without relying on default-open assumptions?
- Can you describe how Virtualization integrates with Architecture and Infrastructure during failure, scaling, and monitoring events?