Site-to-Site VPN Configuration Quiz

1. What does PFS (Perfect Forward Secrecy) ensure in a VPN tunnel?

Session keys are derived from permanent credentials

Each session uses unique encryption keys independent of others

Faster encryption processing

Reduced CPU usage on VPN gateways

2. Which of the following is a critical security consideration when configuring site-to-site VPNs?

Using weak encryption algorithms to improve performance

Implementing strong access control lists on VPN gateways

Disabling logging to reduce overhead

Allowing unencrypted fallback connections

3. What does the MTU (Maximum Transmission Unit) adjustment address in site-to-site VPN configurations?

Increases encryption speed

Prevents packet fragmentation caused by VPN encapsulation overhead

Reduces authentication latency

Improves key exchange efficiency

4. Which authentication method uses digital certificates to verify VPN endpoints and is considered more secure than pre-shared keys?

PSK (Pre-Shared Key)

PKI (Public Key Infrastructure)

RADIUS

TACACS+

5. What is the purpose of Dead Peer Detection (DPD) in a site-to-site VPN?

Encrypting sensitive data

Detecting and removing inactive or failed VPN connections

Authenticating user credentials

Compressing tunnel traffic

6. A VPN tunnel fails to establish. Which is the first troubleshooting step to verify connectivity?

Check encryption algorithm compatibility

Verify network connectivity between VPN endpoints

Reset all IPsec security associations

Change the DH group parameters

7. What is the primary advantage of using site-to-site VPNs instead of point-to-point leased lines?

Higher bandwidth capacity

Cost reduction and use of public internet

Guaranteed zero latency

No need for firewalls

8. What is the primary function of the Internet Key Exchange (IKE) protocol in VPN configuration?

Encrypting all tunnel traffic

Establishing and managing security associations

Authenticating end-user credentials

Monitoring VPN performance metrics

9. In IPsec, which protocol is responsible for encrypting the payload and protecting data confidentiality?

AH (Authentication Header)

ESP (Encapsulating Security Payload)

IKE (Internet Key Exchange)

ISAKMP

10. Which protocol is used for user authentication in remote access VPNs and relies on username/password credentials?

PPP

CHAP

EAP

All of the above

11. Which protocol is commonly used for establishing encrypted site-to-site VPN tunnels and operates at Layer 3?

IPsec

SSL/TLS

PPTP

L2TP

12. Which encryption algorithm provides 256-bit key strength and is widely used in modern site-to-site VPN deployments?

DES

3DES

AES

RC4

13. Which Diffie-Hellman group provides stronger security for modern site-to-site VPN implementations?

DH Group 1

DH Group 5

DH Group 14 or higher

DH Group 2

14. Which IPsec mode encapsulates the entire IP packet, including headers, for maximum security?

Transport mode

Tunnel mode

Hybrid mode

Gateway mode

Submit

Network Security Engineer Configuring a Site to Site VPN Quiz