Drag and drop each IKEv2 exchange on the left to its matching phase on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Phase 1 key agreement
Phase 2 authentication and policy
Rekey or additional SA
Error and status exchange
Phase 1 response with DH public value
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
IKE_SA_INIT: Phase 1 key agreement
IKE_SA_INIT is phase 1 for key agreement; IKE_AUTH is phase 2 for authentication and policy; CREATE_CHILD_SA is used for rekeying or additional SAs.
Quick reference
| 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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Last reviewed: Jun 18, 2026
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.
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