hardMultiple SelectObjective-mapped
300-410 Practice Question: Which TWO actions will prevent an ISATAP tunnel…
Which TWO actions will prevent an ISATAP tunnel from forming correctly? (Choose TWO.)
⚠ Common exam trap
Cisco often tests the misconception that the tunnel destination must be explicitly configured, when in fact ISATAP automatically derives it from the interface ID, and manually setting it to the client's own address breaks the tunnel.
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
✓
Configuring the tunnel destination with the IPv4 address of the ISATAP client itself.
In an ISATAP tunnel, the tunnel destination must be the IPv4 address of the ISATAP client (which is dynamically derived from the ISATAP interface ID). Configuring the tunnel destination with the client's own IPv4 address creates a loopback tunnel that cannot forward traffic, preventing the tunnel from forming correctly. The ISATAP router automatically derives the destination from the IPv4 address embedded in the ISATAP interface ID; manually setting it to the client's address breaks the automatic mapping.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configuring the tunnel destination with the IPv4 address of the ISATAP client itself.
Why this is correct
Correct. The tunnel destination should be the ISATAP router's IPv4 address, not the client's own address.
- ✓
Using a private IPv4 address as the tunnel source on the ISATAP router.
Why this is correct
Correct. ISATAP requires a global IPv4 address for the tunnel source to ensure routability.
- ✗
Configuring the ISATAP interface ID as ::5EFE:xxxx.
Why it's wrong here
Incorrect. The correct ISATAP interface ID is ::0200:5EFE:xxxx (includes the 0200: prefix).
- ✗
Setting the tunnel mode to ipv6ip.
Why it's wrong here
Incorrect. The correct tunnel mode for ISATAP is tunnel mode ipv6ip isatap.
- ✗
Adding a static IPv6 route pointing to the ISATAP tunnel interface.
Why it's wrong here
Incorrect. A static route is often required for ISATAP to direct traffic to the tunnel; its absence would not prevent formation but would affect forwarding.
Go deeper
Related to this question
About these practice questions
One of 1,966 original 300-410 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.