300-710 SNCF Deployment Practice Question
An administrator is deploying a Cisco Secure Firewall Threat Defense Virtual (FTDv) in Microsoft Azure. The architecture calls for a 3-NIC deployment (Management, Inside, and Outside). After deployment, asymmetric routing issues are observed because Azure Load Balancer is forwarding return traffic directly back to a different backend instance. What configuration must be applied to prevent asymmetric drops?
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 Source NAT (SNAT) on the FTDv so that traffic appears to originate from the firewall interface IP, ensuring symmetrical return paths.
Cloud deployments utilizing load balancers often require enabling SNAT (Source NAT) on the firewall so that return traffic flows back through the exact same firewall instance, preventing asymmetric drop behavior.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable Strict Asymmetric Routing Bypass mode in the FTDv Advanced Firewall Settings.
Why it's wrong here
Strict asymmetric routing bypass is generally discouraged and does not solve cloud load balancer return-path issues without SNAT or proper Azure ILB DSR configurations.
- ✗
Disable the Azure UDR (User Defined Route) on the inside subnet.
Why it's wrong here
Disabling UDRs would stop traffic from hitting the firewall entirely.
- ✗
Convert the FTDv deployment from routed mode to transparent mode.
Why it's wrong here
Transparent mode does not eliminate cloud load balancer asymmetric path routing challenges.
- ✓
Configure Source NAT (SNAT) on the FTDv so that traffic appears to originate from the firewall interface IP, ensuring symmetrical return paths.
Why this is correct
Using SNAT ensures that return traffic from servers comes back to the firewall instance's IP address rather than directly to the client, preventing asymmetric routing drops.
Visual reference
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
About these practice questions
This 300-710 SNCF question is part of Courseiva's 478-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Cisco exam blueprint
This 300-710 SNCF 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 300-710 SNCF exam.