Implementing and Maintaining Cisco Technologies Using IOS XR (IMTXR)

Here you have the best Cisco 644-906 practice exam questions

  • You have 77 total questions across 16 pages (5 per page)
  • These questions were last updated on February 9, 2026
  • This site is not affiliated with or endorsed by Cisco.
Question 1 of 77
Refer to the show environmental power-supply command output exhibit.
Exam 644-906: Question 1 - Image 1
How much power is the system currently using?
Suggested Answer: A

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Question 2 of 77
Refer to the show environmental power-supply command output exhibit.
Exam 644-906: Question 2 - Image 1
How many additional line cards of the same type that are currently in the system can you safely install and remain redundant in the worse power usage if there is a power supply failure?
Suggested Answer: A

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Question 3 of 77
What is the maximum long-term normal operating temperature of the Cisco CRS-1, ASR 9000 Series Routers, and XR 12000 Series Routers?
Suggested Answer: A

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Question 4 of 77
The Cisco CRS 16-Slot Line Card Chassis Site Planning Guide suggests having 48 inches of clearance behind the chassis. What would definitely happen to the system if there were only 28 inches of clearance behind the Cisco CRS 16-Slot Line Card Chassis?
Suggested Answer: D

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Question 5 of 77
How many planes are there in the Cisco CRS-3 switch fabric?
Suggested Answer: D

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About the Cisco 644-906 Certification Exam

About the Exam

The Cisco 644-906 (Implementing and Maintaining Cisco Technologies Using IOS XR (IMTXR)) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 77 practice questions across 16 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our 644-906 questions are regularly updated to reflect the latest exam objectives.