Top 60+ VPN Interview Questions and Answers

by | Dec 10, 2018 | Free Resources

Are you preparing for an interview for a Network Engineer position that requires knowledge of VPN – virtual private network? If so, you’ve come to the right site. This blog post will provide a comprehensive list of frequently asked VPN Interview Questions with answers to help you ace your upcoming interview. Whether you’re a beginner or an experienced professional, these Top 60 VPN Interview Questions and Answers will provide valuable skills and knowledge and help you feel assured, confident, and prepared for your interview. So let’s dive in and get started!

Here is a expert-curated list of frequently asked Top 60+ VPN Interview Questions and Answers

Question 1 What is VPN?

Question 2 What Security Vulnerabilities Are Addressed By VPN?

Question 3  What is Authentication, Confidentiality & Integrity?

Question 4 Can You List Some Items For A VPN Checklist From Deciding Whether To Use, Then Selecting, Then Deploying, then Maintaining VPN?

Question 5  What is Symmetric and Asymmetric Encryption?

Question 6  What is IPSec VPN?

Question 7 Is VPN A Long-term Solution Or A Short-term Stop Gap Kind Of Thing?

Question 8 At what layer IPsec works?

Question 9 What Are Unreasonable Expectations For VPN?

Question 10 Name a major drawback of IPSec?

Question 11 What is the difference between Transport and Tunnel mode?

Question 12  What are the three main security services that IPSec VPN provides?

Question 13 Define Digital Signatures?

Question 14 What Are Reasonable Expectations For A VPN?

Question 15 What is Authorization?

Question 16  Is There Market Penetration For These Products?

Question 17 What Firewall Issues Are Relevant To VPN Selection And Deployment?

Question 18 What is Site to Site and Remote Access VPN?

Question 19 What are the 3 protocols used in IPSec?

Question 20  Explain IPsec Protocol Headers?

Question 21 How ESP & AH provides anti-replay protection?

Question 22  What is IKE?

Question 23 What Kind Of Resources (staff, Computational Muscle, Bandwidth, etc) Are Required for VPN Deployment, Usage, Maintenance?

Question 24 At what protocol does IKE works?

Question 25  Explain how IKE/ISAKMP Works?

Question 26  Explain the messages exchange between the peers in IKE/ISAKMP?

Question 27 What Is The Relationship Between VPN And Firewalls?

Question 28 What is Diffie-Hellman?

Question 29  How Diffie-Hellman works?

Question 30 What are Security Associations?

Question 31 What is Transform set?

Question 32  What are Crypto access lists?

Question 33 Are There Applications or Environments in Which VPNs Would Really Be Detrimental?

Question 34 What are Crypto map?

Question 35  How do you check the status of the tunnel’s phase 1 & 2?

Question 36  What is IPsec Virtual Tunnel Interface?

Question 37 Are VPNs Used For Specific Kinds Of Applications Or Environments? If So, What Are Some Examples Of Where And Why VPNs Would Be Deployed?

Question 38 What is the difference between Static Crypto Maps and Dynamic Crypto Maps?

Question 39 What is Cisco Easy VPN?

Question 40 What is DMVPN?

Question 41  What Crypto Issues Are Relevant In The VPN Context?

Question 42  What are the three phases of DMVPN?

Question 43  Explain Next Hop Resolution Protocol (NHRP)?

Question 44 What is GRE?

Question 45  Name a major drawback of both GRE & L2TP?

Question 46 Who Are The Major Players In The Market?

Question 47  What is SSL VPN? How it is different from IPsec VPN?

Question 48 At which Layer does SSL VPN operates?

Question 49  What are different SSL VPN Modes?

Question 50 What Are Some Of The Tough Questions To Pose To VPN Product Vendors?

Question 51 Explain SSL Handshake?

Question 52  What Kind Of Performance Issues Does VPN Raise?

Question 53 What Security Vulnerabilities Are Unique To Or Heightened By VPN?

Question 54: What is a VPN and how does it work?

Question 55: What are the main benefits of using a VPN?

Question 56: How does a VPN provide security and privacy for internet users?

Question 57: Can a VPN be used to access content that is restricted in a specific location?

Question 58: What are the different types of VPNs and how do they differ?

Question 59: How does a VPN handle traffic from multiple devices or users?

Question 60: What is the process for setting up and configuring a VPN?

Question 61: Can a VPN be used on all types of devices and operating systems?

Question 62: How does a VPN impact internet speeds and performance?

Question 63: What is the process for troubleshooting and maintaining a VPN?


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