Short on study time before your 644-906 exam? The 77 practice questions from Actual4Exams focus on the objectives that matter most in the Cisco Implementing and Maintaining Cisco Technologies Using IOS XR test, so every review session counts. Download the PDF and turn spare minutes into real progress.
Cisco 644-906 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Implementing and Maintaining Cisco Technologies Using IOS XR |
| Exam Number: | 644-906 |
| Exam Format: | Multiple choice, Simulation-based questions (historical/legacy exam format) |
| Related Certifications: | CCIE Service Provider |
| Available Languages: | English |
| Recommended Training: | Cisco Learning Network |
| Exam Registration: | Cisco Certification Registration |
| Sample Questions: |  |
| Exam Way: | Historical Cisco certification exam delivery (typically proctored testing center or online proctoring depending on program period) |
| Pre Condition: | Recommended: strong knowledge of Cisco networking fundamentals and service provider routing technologies |
| Official Syllabus URL: | https://www.cisco.com/ |
Cisco 644-906 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Layer 2 Technologies | - Ethernet switching concepts in IOS XR - VLANs and trunking |
| Topic 2: Quality of Service (QoS) | - Queuing and congestion management - QoS classification and marking |
| Topic 3: System Operations and Troubleshooting | - Troubleshooting routing and forwarding issues - Monitoring IOS XR systems |
| Topic 4: MPLS and Service Provider Technologies | - Traffic engineering concepts - MPLS forwarding and label distribution - L3VPN and L2VPN services |
| Topic 5: IOS XR System Architecture | - Platform architecture and operating model - Process separation and high availability design |
| Topic 6: Layer 3 Routing | - OSPF configuration and optimization - IS-IS implementation - BGP design and policy control |
| Topic 7: Automation and Programmability (Foundational) | - Model-driven telemetry overview - Basic IOS XR automation concepts |
Common Questions About the Cisco 644-906 Exam
The 644-906 exam, officially known as Cisco Implementing and Maintaining Cisco Technologies Using IOS XR, is the Cisco test that leads to the Cisco Certified Internetwork Expert (CCIE) Service Provider (legacy track) certification at the Expert level. Passing it validates the skills employers expect from a certified professional. It is also associated with related credentials such as CCIE Service Provider.
Recommended: strong knowledge of Cisco networking fundamentals and service provider routing technologies
Entry requirements can change, so confirm the latest conditions on the official exam page: https://www.cisco.com/.
You can book the 644-906 exam through the official registration channels below:
Exam delivery: Historical Cisco certification exam delivery (typically proctored testing center or online proctoring depending on program period). Seats at popular test centers fill quickly, so schedule early once your preparation is on track.
Cisco recommends the following training options for Cisco Implementing and Maintaining Cisco Technologies Using IOS XR candidates:
Pair any course with the 77 practice questions from Actual4Exams to measure how ready you really are before paying the exam fee.
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If you take the corresponding 644-906 exam within 60 days of purchase and do not pass, you can apply for a full refund under the 100% Money Back Guarantee: submit a scan of your enrollment slip and your official Score Report (PDF) within 2 days of the exam date, and the claim is processed within 7 days. Attempts made within 3 days of purchase, downloads without an actual exam attempt, free materials, and expired orders are not eligible, and the candidate name must match the payer name. Prefer new material instead of a refund? You can exchange your purchase for two free products of equal value and keep the update service on your original product. As for delivery, the files are available for instant download and are also emailed to you within one minute of payment — if nothing arrives within 2 hours, contact customer service. There is no limit on how many computers you can install the product on.
The official Cisco Implementing and Maintaining Cisco Technologies Using IOS XR outline is organized into 7 domains. The first three are:
- System Operations and Troubleshooting
- Layer 2 Technologies
- Automation and Programmability (Foundational)
See the complete exam topics section above for the full outline and the weighting of every domain.
Cisco Implementing and Maintaining Cisco Technologies Using IOS XR Sample Questions:
Question 1
Which Cisco IOS XR command is the most useful for checking if traffic is being sent for a specific multicast group?
A. show ip mroute traffic 226.1.1.1
B. show mrib route 226.1.1.1
C. show multicast stats
D. show mfib route 226.1.1.1
Question 2
Where are client interfaces terminated on the Cisco CRS-3?
A. the switch fabric interface terminator
B. the modular services card
C. the Service Processor 140
D. the Service Processor 40
E. the physical layer interface module(s)
Question 3
What is the correct procedure to associate a VRF to a static route?
A. specify the VRF in the route global configuration command
B. specify the VRF under "router static" in configuration mode
C. define the VRF in the global configuration
D. configure the VRF under the interface
Question 4
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?
A. The modular services card (MSC) could not be exchanged if one failed.
B. The fabric card could not be exchanged if one failed.
C. The system would overheat due to inadequate airflow.
D. The fan tray could not be exchanged if one failed.
Question 5
Which two commands will allow you to check if interface Bundle-Ether1 has ACL Ethernet_In applied to its ingress? (Choose two.)
A. show interface Bundle-Ether1 access-list
B. show ipv4 interface Bundle-Ether 1
C. show running-config interface Bundle-Ether 1
D. show access-list ipv4 Ethernet_In
E. show running-config ipv4 access-list Ethernet_In
Solutions:
| Question 1 Answer: D | Question 2 Answer: E | Question 3 Answer: B | Question 4 Answer: D | Question 5 Answer: B,C |
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