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CCNP Practice Question: Drag and drop the steps of FlexVPN spoke-to-spoke…

Drag and drop the steps of FlexVPN spoke-to-spoke dynamic tunnel creation into the correct order, from first to last.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps
Order
1Step 1
2Step 2
3Step 3
4Step 4
5Step 5

⚠ Common exam trap

A common trap is confusing IKE versions: FlexVPN exclusively uses IKEv2, so any reference to IKEv1 in the steps is incorrect. Also, authentication in FlexVPN is direct between spokes, not proxied through the hub.

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

Spoke1 sends IKEv2 request to hub for Spoke2

In FlexVPN, the spoke-to-spoke dynamic tunnel creation process uses IKEv2, not IKEv1. The correct sequence: Spoke1 sends an IKEv2 request to the hub for information about Spoke2. The hub responds with a redirect notification containing Spoke2's address. Spoke1 then initiates a direct IKEv2 SA with Spoke2. Authentication is performed directly between spokes (typically using certificates or pre-shared keys), not via the hub. After authentication, they establish an IPsec SA for secure data transfer.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Spoke1 sends IKEv2 request to hub for Spoke2

    Why this is correct

    This step is correct in order but contains a common mistake: it says 'IKEv1' but FlexVPN uses IKEv2. The step should read 'Spoke1 sends IKEv2 request to hub for Spoke2'.

  • Hub sends redirect notification with Spoke2 address

    Why this is correct

    Correct: The hub sends a redirect notification with the destination spoke's address. This step is accurate.

  • Spoke1 initiates IKEv2 SA with Spoke2

    Why this is correct

    Correct: Spoke1 initiates an IKEv2 SA directly with Spoke2 after receiving the redirect. This step is accurate.

  • Spoke1 and Spoke2 authenticate each other directly

    Why this is correct

    This step is correct in order but the description is misleading: authentication is direct between spokes, not via the hub. The step should read 'Spoke2 authenticates Spoke1 directly'.

  • Spoke1 and Spoke2 establish IPsec SA

    Why this is correct

    Correct: After authentication, Spoke1 and Spoke2 establish an IPsec SA for data transfer.

Quick reference

VPN Protocol Comparison

ProtocolPortEncryptionAuthenticationUse Case
IKEv2 / IPsecUDP 500 / 4500AES-256Certificates / PSKSite-to-site & remote access
SSL / TLS VPNTCP 443TLS 1.3Certificates / MFAClientless remote access
L2TP / IPsecUDP 1701AES (IPsec)PSK / CertificatesLegacy remote access
WireGuardUDP 51820ChaCha20Public keysModern high-performance VPN
PPTPTCP 1723MPPE (weak)MS-CHAPv2Legacy — avoid in production

PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

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.