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Cisco 644-906 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Implementing and Maintaining Cisco Technologies Using IOS XR |
| Exam Number: | 644-906 |
| Exam Format: | Simulation-based questions (historical/legacy exam format), Multiple choice |
| 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 |
|---|---|
| System Operations and Troubleshooting | - Troubleshooting routing and forwarding issues - Monitoring IOS XR systems |
| Automation and Programmability (Foundational) | - Model-driven telemetry overview - Basic IOS XR automation concepts |
| Layer 2 Technologies | - VLANs and trunking - Ethernet switching concepts in IOS XR |
| IOS XR System Architecture | - Platform architecture and operating model - Process separation and high availability design |
| Quality of Service (QoS) | - Queuing and congestion management - QoS classification and marking |
| Layer 3 Routing | - IS-IS implementation - BGP design and policy control - OSPF configuration and optimization |
| MPLS and Service Provider Technologies | - Traffic engineering concepts - MPLS forwarding and label distribution - L3VPN and L2VPN services |
Cisco 644-906: The Questions Everyone Asks
Recommended: strong knowledge of Cisco networking fundamentals and service provider routing technologies Eligibility details like these are worth double-checking before you register — vendors revise them periodically, and the official exam page (official 644-906 exam page) always has the current version.
The official Cisco Implementing and Maintaining Cisco Technologies Using IOS XR outline has 7 domains — the biggest include Layer 2 Technologies, Layer 3 Routing, Automation and Programmability (Foundational). Those weightings are your study compass: the largest domains hide the most points. See the full outline above for every subtopic.
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Classroom hours alone won't tell you if you're ready — the 644-906 practice questions from BraindumpsIT will. Use them after the coursework to convert knowledge into exam performance.
The Cisco Implementing and Maintaining Cisco Technologies Using IOS XR is Cisco's official exam for the Cisco Certified Internetwork Expert (CCIE) Service Provider (legacy track) certification, a Expert-level credential. Candidates take it to validate real skill — and employers read it exactly that way. It also connects to related credentials such as CCIE Service Provider.
Cisco Implementing and Maintaining Cisco Technologies Using IOS XR Sample Questions:
Which of the following configurations adds a community to routes that are matched on AS criteria?
- A. route-policy policy1 if community in set1 then set community (356:1000) additive endif end-policy
- B. route-policy policy1 if as-path neighbor-is set1 then set community (356:1000) additive endif end-policy
- C. route-policy policy1 if as-path in set1 then set community (356:1000) endif end-policy
- D. route-policy policy1 if as-path in set1 then set community (356:1000) additive endif end-policy
Correct Answer: D 🗳️
Which statement is false?
- A. A Cisco IOS XR device can be configured as a stratum 1 master clock source.
- B. A Cisco IOS XR device can be directly connected to an atomic clock and provide a stratum 1 service.
- C. The NTP stratum describes how many hops away that a system is from an authoritative time source.
- D. UTC is a global time scale that is distributed by atomic clocks over the Internet, over specialist long-wave radio transmissions, or with the Global Positioning System (GPS) network.
Correct Answer: B 🗳️
Which Cisco IOS XR command sequence will load a specific configuration?
- A. #copy tftp://255.255.255.255/name.cfg
- B. (config)#load commit <name>
- C. #copy disk0:name.cfg running-confirguration
- D. (config)#load disk0:name.cfg
- E. #load commit changes <name>
Correct Answer: D 🗳️
Refer to the exhibit.
Examine the configuration for AAA and the vty line.
If the user attempts to connect to the router via an SSH session to the vty, which one is true?
- A. The user will be prompted only for a password and can successfully log in using the password "cisco." The user will not be assigned any tasks.
- B. The user will be prompted for a username and password and can successfully log in using "user1" and "lab." The user will be a member of the user group operator.
- C. The user will not be able to authenticate with this configuration.
- D. The user will be prompted for a username and password and can successfully log in using "user1" and "lab." The user will be a member of the user group root-system.
- E. The user will be prompted only for a password and can successfully log in using the password "cisco." The user will be a member of the user group operator.
Correct Answer: D 🗳️
