Cisco 642-991 Exam Information and Actual Questions
- Exam Code/Number: 642-991
- Exam Name/Title: Cisco Data Center Unified Fabric Solutions Design (DCUFD)
- Certification Provider: Cisco
- Corresponding Certification: Cisco Specialist
- Exam Questions: 75
- Updated On: Jul 23, 2026
642-991
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Cisco
642-991 Exam
Cisco Data Center Unified Fabric Solutions Design (DCUFD)
This exam has been stopped to register, new exam code replace: 642-996
Cisco 642-991 Exam Overview:
| Certification Vendor: | Cisco |
| Exam Name: | Cisco Data Center Unified Fabric Solutions Design (DCUFD) |
| Exam Number: | 642-991 |
| Real Exam Qty: | 65-75 |
| Certificate Validity Period: | 3 years |
| Exam Price: | USD 250–300 |
| Related Certifications: | CCNP Data Center Cisco Unified Fabric Design Specialist |
| Exam Format: | Multiple Choice Single Answer, Multiple Choice Multiple Answer, Drag and Drop, Scenario-based |
| Available Languages: | English, Japanese |
| Exam Duration: | 90 minutes |
| Passing Score: | 750 (scale 100-900) |
| Recommended Training: | Designing Cisco Data Center Unified Fabric (DCUFD) v5.0 |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Cisco 642-991 Sample Questions |
| Exam Way: | Onsite at Pearson VUE authorized testing centers; closed-book |
| Pre Condition: | Recommended: CCNA Data Center or equivalent knowledge; no strict mandatory prerequisite |
| Official Syllabus URL: | https://www.cisco.com |
Cisco 642-991 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design Methodology | 6% | - Data center design requirements - Business trends and requirements - Characterizing existing infrastructure |
| Topic 2: Data Center Architecture and Modularity | 15% | - Scalability and high availability models - Modular design principles - Data center layered architecture |
| Topic 3: Storage Networking Design | 12% | - FCoE, Fibre Channel, and iSCSI - Storage integration in unified fabric - SAN architecture and redundancy |
| Topic 4: Core Layer Design | 18% | - Core layer characteristics and functions - Multicast and traffic engineering - Routing protocols and design |
| Topic 5: Aggregation Layer Design | 20% | - Aggregation layer features - FabricPath and OTV design - VLAN, VRF, and virtualization |
| Topic 6: Security and Management Design | 14% | - Data center security framework - Monitoring, management, and automation - Access control and segmentation |
| Topic 7: Access Layer Design | 15% | - Server and storage access design - Unified fabric connectivity - Top-of-Rack and End-of-Row models |
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