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350-401 Practice Question: Which two statements about NetFlow flow records…

Which two statements about NetFlow flow records and export are correct? (Choose two.)

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

✓

NetFlow v9 uses a template-based export format.

NetFlow v5 has a fixed format with 7 key fields, while v9 is template-based and flexible. IPFIX is the IETF standard based on v9. NetFlow export uses UDP by default (port 2055 for v5, 4729 for IPFIX). TCP is not the default transport.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✓

    NetFlow v9 uses a template-based export format.

    Why this is correct

    Correct because v9 introduces templates that define which fields are exported, allowing flexibility.

  • ✓

    IPFIX is the IETF standard version of NetFlow, based on NetFlow v9.

    Why this is correct

    Correct because IPFIX (RFC 7011) is derived from NetFlow v9 and is the standardized version.

  • ✗

    NetFlow v5 supports variable-length fields and custom flow keys.

    Why it's wrong here

    Incorrect because v5 has a fixed format with 7 predefined fields; it does not support variable-length or custom keys.

  • ✗

    NetFlow export uses TCP by default to ensure reliable delivery.

    Why it's wrong here

    Incorrect because NetFlow uses UDP by default; TCP can be configured but is not the default.

  • ✗

    NetFlow v5 can export IPv6 flow information.

    Why it's wrong here

    Incorrect because v5 was designed for IPv4 only; IPv6 support requires v9 or IPFIX.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 350-401 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 350-401 exam.