Question 684 of 2,152
BGP TroubleshootingeasyMultiple ChoiceObjective-mapped

BGP NOTIFICATION Message — Fatal Error Cause and Session Termination

This 300-410 practice question tests your understanding of bgp troubleshooting. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.

Which BGP message type is sent when a fatal error is detected, causing the BGP session to close?

Quick Answer

The answer is the NOTIFICATION message. This BGP message type is sent when a fatal error is detected, causing the BGP session to close immediately, as it reports the specific error condition—such as a malformed attribute, hold timer expiry, or neighbor state machine violation—and terminates the TCP connection. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of BGP finite state machine operations and error handling; a common trap is confusing NOTIFICATION with the KEEPALIVE or UPDATE messages, which do not trigger session closure. Remember that NOTIFICATION is the only BGP message that both reports the error and tears down the session, making it the definitive "kill switch" for BGP peering. A useful memory tip: think of a red "NOTIFICATION" banner that ends the conversation—if you see a fatal error, the session is done.

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

NOTIFICATION

NOTIFICATION messages are sent to report errors and terminate the BGP session.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

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

  • OPEN

    Why it's wrong here

    OPEN messages initiate sessions.

  • UPDATE

    Why it's wrong here

    UPDATE messages carry routing information.

  • NOTIFICATION

    Why this is correct

    Correct. NOTIFICATION messages indicate errors and close the session.

    Related concept

    Read the scenario before looking for a memorised answer.

  • KEEPALIVE

    Why it's wrong here

    KEEPALIVE messages maintain the session.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.
  • Use explanations to understand the rule behind the answer.

TExam Day Tips

  • Underline the problem statement mentally.
  • 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

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

What to study next

Got this wrong? Here's your next step.

Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this 300-410 question test?

BGP Troubleshooting — This question tests BGP Troubleshooting — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: NOTIFICATION — NOTIFICATION messages are sent to report errors and terminate the BGP session.

What should I do if I get this 300-410 question wrong?

Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 18, 2026

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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.