DCNP study guide
DCNP · Work through your exam, one topic at a time.
The DCNP is a professional-level certification for network engineers who design, build, and operate data center fabrics rather than campus or branch networks. It suits candidates who already hold a foundational networking certification or have equivalent hands-on experience and now want to demonstrate depth in leaf-spine design, overlay networking, automation, and day-two operations. The DCNP study guide has 6 sections and about 2,261 words.
01Data Center Networking Fundamentals and Architectures
Domain 1 tests how you turn workload requirements into a physical and logical data center topology: fabric shape, capacity, redundancy, and failure domains. Expect items that give port counts and ask for oversubscription, or describe a traffic pattern and ask which topology fits.
405 words, about 2 min02Switching, Routing, and Overlay Technologies
Domain 2 covers the mechanics underneath a modern data center fabric: VLANs and trunking, link aggregation, Layer 2 edge features, Layer 3 underlay routing, and VXLAN-EVPN overlays. Questions test whether you know where a frame is encapsulated, which table answers a lookup, and what breaks when MTU or ARP handling is wrong.
395 words, about 2 min03Network Virtualization and Software-Defined Networking
Domain 3 tests the separation of control and forwarding, and how virtual networks are built over a shared physical fabric. You should be able to explain what a controller actually does, how tenants are isolated, and where NFV fits.
390 words, about 2 min04Network Security and Segmentation
Domain 4 tests how you stop lateral movement inside the data center. Expect questions on segmentation models, access control placement, first-hop security, and encryption, plus scenarios where a rule looks correct but fails because of direction, state, or asymmetry.
366 words, about 2 min05Automation, Orchestration, and Programmability
Domain 5 tests whether you can change the fabric repeatably and safely. Questions focus on data models, APIs, idempotency, and pipeline practice rather than on writing long scripts.
359 words, about 2 min06Monitoring, Troubleshooting, and Operations
Domain 6 tests operational judgment: how you collect evidence, isolate a layer, and prove a fix. Questions often present a symptom such as intermittent drops, slow storage, or a flapping adjacency and ask for the next diagnostic step or the most likely cause.
346 words, about 2 min