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mediumDrag & DropObjective-mapped
300-410 Practice Question: Drag and drop the steps to verify and validate…
Drag and drop the steps to verify and validate the operational state of an IPsec site-to-site VPN into the correct order, from first to last.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Check IKEv2 SA using show crypto ikev2 sa
Begin by checking the IKE Phase 1 SA to ensure the control plane is established, then verify the IPsec Phase 2 SA for data-plane encryption. Confirm the tunnel interface is up/up, examine the crypto map to ensure it is active, and finally test traffic flow with a ping or extended ping.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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