350-701 Network Security Practice Question
A network administrator is configuring site-to-site IPsec VPN between two Cisco ASAs using IKEv2. They want to ensure that only specific subnets are encrypted, using Virtual Tunnel Interface (VTI). Which configuration element is essential for VTI?
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
✓
A tunnel interface with an IP address and a crypto map.
VTI uses a tunnel interface that is dedicated to the VPN, and the crypto map is applied to the tunnel interface rather than the physical interface. For IKEv2, the tunnel mode is enabled and the crypto map is applied to the VTI.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A crypto map applied to the physical interface.
Why it's wrong here
Incorrect. For VTI, the crypto map is applied to the tunnel interface, not the physical interface.
- ✓
A tunnel interface with an IP address and a crypto map.
Why this is correct
Correct. VTI requires a tunnel interface with an assigned IP address and a crypto map applied to it.
- ✗
A transform set with ESP encryption and authentication.
Why it's wrong here
Incorrect. Transform set is part of IPsec, but VTI requires tunnel interface and crypto map.
- ✗
An ISAKMP policy with pre-shared key.
Why it's wrong here
Incorrect. ISAKMP policy is needed for IKE phase 1, but not specific to VTI.
Visual reference
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 350-701 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 350-701 exam.