300-710 SNCF Deployment Practice Question
You are deploying a Cisco Secure Firewall Threat Defense in transparent mode. How are frames forwarded between the internal and external interfaces of the firewall?
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
✓
By bridging frames at Layer 2 based on destination MAC addresses within a configured Bridge Group.
Transparent mode bridges traffic at Layer 2 using Bridge Groups and Bridge Virtual Interfaces (BVIs), forwarding frames based on destination MAC addresses rather than Layer 3 routing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
By encapsulating all packets inside GRE tunnels between the ingress and egress ports.
Why it's wrong here
GRE tunneling is not used for internal transparent bridging.
- ✓
By bridging frames at Layer 2 based on destination MAC addresses within a configured Bridge Group.
Why this is correct
Transparent firewalls use Layer 2 bridging, forwarding frames based on MAC addresses across bridge groups.
- ✗
By translating all private IP addresses to public IP addresses using NAT overload.
Why it's wrong here
NAT is a Layer 3/4 function and is not inherent to transparent bridging.
- ✗
By performing IP route lookups and decrementing the TTL on every packet.
Why it's wrong here
TTL is decremented in routed mode (Layer 3), not transparent mode.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
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.