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Question 1,145 of 1,420
mediumDrag & DropObjective-mapped
350-401 Practice Question: Drag and drop the steps of FlexVPN IKEv2 spoke…
Drag and drop the steps of FlexVPN IKEv2 spoke registration to hub 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
✓
Initiate IKEv2 SA to hub
FlexVPN IKEv2 spoke registration starts with the spoke initiating an IKEv2 SA to the hub, followed by authentication using certificates or pre-shared keys, then the spoke sends a configuration payload request, the hub assigns an IP address and pushes policies, and finally the spoke installs the IPsec SA and routes traffic through the hub. The correct order is: initiate IKEv2 SA to hub, authenticate using certificates or PSK, send configuration payload request, hub assigns IP and pushes policies, spoke installs IPsec SA and routes traffic.
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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Same concept, more angles
1 more way this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Drag and drop the steps of FlexVPN IKEv2 spoke registration to hub into the correct order, from first to last.
medium- ✓ A.Spoke initiates IKEv2 SA to hub
- ✓ B.Hub authenticates spoke via pre-shared key
- ✓ C.Hub assigns IP address to spoke
- ✓ D.Spoke sends registration notify to hub
- ✓ E.Spoke installs tunnel route and connects
Why A: FlexVPN uses IKEv2 for authentication and tunnel setup. The spoke initiates IKEv2 SA negotiation with the hub. After authentication, the hub assigns an IP address to the spoke via configuration payload. The spoke then registers its identity with the hub using IKEv2 notify messages. Finally, the spoke installs the tunnel route and can communicate.
Last reviewed: Jun 18, 2026
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