- A
0
Default administrative distance for static routes to tunnel interfaces is 0, not 1.
- B
1
Why wrong: Incorrect. The value 1 is the default administrative distance for a static route with a next-hop IP address, but not when the next-hop is a tunnel interface.
- C
10
Why wrong: Incorrect. Administrative distance 10 is the default for OSPF routes, not for static routes to tunnel interfaces.
- D
20
Why wrong: Incorrect. Administrative distance 20 is the default for EIGRP summary routes or static routes with a distance specified, not for static routes to tunnel interfaces.
Question 1,656 of 2,152
300-410 Administrative distance (AD) Practice Question
This 300-410 practice question tests your understanding of ipv6 tunneling techniques. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: administrative distance (AD). Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
What is the default administrative distance for a static route pointing to a tunnel interface in Cisco IOS-XE?
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
✓
0
In Cisco IOS-XE, a static route pointing to a tunnel interface (e.g., a GRE or IPsec tunnel) uses a default administrative distance of 0. This is because the route is considered directly connected to the tunnel interface, and directly connected routes have an administrative distance of 0, overriding any other route type. This behavior is specific to tunnel interfaces and differs from static routes pointing to next-hop IP addresses, which default to an administrative distance of 1.
Key principle: Administrative distance (AD)
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
0
Why this is correct
Default administrative distance for static routes to tunnel interfaces is 0, not 1.
Related concept
- ✗
1
Why it's wrong here
Incorrect. The value 1 is the default administrative distance for a static route with a next-hop IP address, but not when the next-hop is a tunnel interface.
- ✗
10
Why it's wrong here
Incorrect. Administrative distance 10 is the default for OSPF routes, not for static routes to tunnel interfaces.
- ✗
20
Why it's wrong here
Incorrect. Administrative distance 20 is the default for EIGRP summary routes or static routes with a distance specified, not for static routes to tunnel interfaces.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that all static routes default to an administrative distance of 1, but the trap here is that static routes pointing to a tunnel interface are treated as directly connected, resulting in a default metric of 0, not 1.
Detailed technical explanation
How to think about this question
When a static route points to a tunnel interface, Cisco IOS-XE treats the route as directly connected because the tunnel interface is considered a point-to-point link. The administrative distance of 0 ensures that the route is always preferred over any dynamic routing protocol or other static routes. This behavior is defined in Cisco's implementation of RFC 1812 and is critical for ensuring that traffic destined for the tunnel's remote network is forwarded without interference from other routing sources, especially in overlay networks like DMVPN or IPsec VTI.
KKey Concepts to Remember
- Administrative distance (AD)
- Static route to tunnel interface
- Directly connected route
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Administrative distance (AD)
Real-world example
How this comes up in practice
A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Administrative distance (AD) Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
What to study next
Got this wrong? Here's your next step.
Review administrative distance (AD), then practise related 300-410 questions on the same topic to reinforce the concept.
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IPv6 Tunneling Techniques — study guide chapter
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FAQ
Questions learners often ask
What does this 300-410 question test?
IPv6 Tunneling Techniques — This question tests IPv6 Tunneling Techniques — Administrative distance (AD).
What is the correct answer to this question?
The correct answer is: 0 — In Cisco IOS-XE, a static route pointing to a tunnel interface (e.g., a GRE or IPsec tunnel) uses a default administrative distance of 0. This is because the route is considered directly connected to the tunnel interface, and directly connected routes have an administrative distance of 0, overriding any other route type. This behavior is specific to tunnel interfaces and differs from static routes pointing to next-hop IP addresses, which default to an administrative distance of 1.
What should I do if I get this 300-410 question wrong?
Review administrative distance (AD), then practise related 300-410 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Administrative distance (AD)
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Last reviewed: Jun 24, 2026
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