hardMultiple SelectObjective-mapped
300-410 Practice Question: Which TWO configuration changes are required to…
Which TWO configuration changes are required to enable IPsec site-to-site VPN with IKEv2 and pre-shared keys on a Cisco IOS router? (Choose TWO.)
⚠ Common exam trap
Cisco often tests the distinction between IKEv1 and IKEv2 commands, and the trap here is that candidates familiar with IKEv1 mistakenly select the 'crypto isakmp key' or 'crypto map' options, not realizing IKEv2 requires a keyring and IPsec profile instead.
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
✓
Configure an IKEv2 keyring with the pre-shared key and peer IP address.
A is correct because IKEv2 uses a keyring to store pre-shared keys (PSKs) and associate them with specific peer IP addresses, replacing the legacy 'crypto isakmp key' command used in IKEv1. The keyring is then referenced by an IKEv2 profile, which binds the authentication method and other parameters to the VPN session.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure an IKEv2 keyring with the pre-shared key and peer IP address.
Why this is correct
Correct. The keyring defines the pre-shared key and associates it with the peer.
- ✗
Apply the 'crypto isakmp key' command globally for the peer.
Why it's wrong here
Incorrect. 'crypto isakmp key' is used for IKEv1, not IKEv2.
- ✓
Create an IKEv2 profile that references the keyring.
Why this is correct
Correct. The IKEv2 profile ties the keyring, authentication method, and other parameters together.
- ✗
Define a transform set under the IKEv2 policy.
Why it's wrong here
Incorrect. Transform sets are used in IPsec crypto maps, not in IKEv2 policies.
- ✗
Use the 'crypto map' command to reference the IKEv2 profile.
Why it's wrong here
Incorrect. The crypto map references an IPsec profile, not the IKEv2 profile directly.
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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.