350-701 Network Security Practice Question
A network security engineer is configuring site-to-site IPsec VPN between two Cisco ASA firewalls using IKEv2. Which of the following configuration elements is required to define the encryption and integrity algorithms for the IPsec SA?
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
✓
Transform set
In IKEv2, the IPsec SA parameters (encryption, integrity, etc.) are defined in the transform set. IKEv2 uses a single transform set. ISAKMP policy is for IKEv1 phase 1. Crypto map binds the transform set to a peer and interface. VTI is a virtual interface for routing but not for algorithm definition.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Crypto map
Why it's wrong here
Crypto map references the transform set but does not define the algorithms.
- ✗
Virtual Tunnel Interface (VTI)
Why it's wrong here
VTI is an interface for routing traffic over VPN, not for defining algorithms.
- ✓
Transform set
Why this is correct
Transform set defines the encryption and integrity algorithms for the IPsec SA.
- ✗
ISAKMP policy
Why it's wrong here
ISAKMP policy is used for IKE phase 1, not IPsec SA.
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.