About This Flashcard Deck
This flashcard deck contains 10 cards covering key Data Center Core concepts for the DCCOR exam. Test your DCCOR knowledge. Use active recall by attempting to answer each question before revealing the answer.
Question
What is VXLAN VNI?
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Answer
VXLAN Network Identifier — 24-bit field supporting ~16 million network segments. Maps to VLANs at the VTEP.
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All Data Center Core Flashcards
Q: What is VXLAN VNI?
A: VXLAN Network Identifier — 24-bit field supporting ~16 million network segments. Maps to VLANs at the VTEP.
Q: What is Cisco ACI?
A: Application Centric Infrastructure — policy-driven SDN for data centers using APIC controller, spine-leaf topology, and application-centric security model.
Q: What is a UCS Service Profile?
A: A configuration template that defines server identity (UUID, MAC, WWNN/WWPN, boot policy). Can be moved between physical servers.
Q: What is vPC?
A: Virtual Port Channel — allows two Nexus switches to appear as one for downstream devices. Eliminates STP blocked ports.
Q: What is Fibre Channel zoning?
A: Controls which initiators (hosts) can access which targets (storage). Types: single-initiator-single-target is best practice.
Q: What is FCoE?
A: Fibre Channel over Ethernet — encapsulates FC frames in Ethernet, allowing SAN and LAN traffic on the same physical network (requires lossless Ethernet/DCB).
Q: What is the ACI policy model hierarchy?
A: Tenant → Application Profile → EPG (Endpoint Group) → Contract (defines allowed communication between EPGs).
Q: What is OTV?
A: Overlay Transport Virtualization — extends L2 across data centers over L3 infrastructure. Site-aware, prevents STP issues.
Q: What is spine-leaf architecture?
A: Every leaf switch connects to every spine switch. Provides consistent latency, no STP, and easy horizontal scaling.
Q: What is NX-API?
A: Nexus API — allows programmatic access to Nexus switches via HTTP/HTTPS using JSON/XML for automation.
Cisco Flashcard Study Strategy
Cisco exams heavily test protocol operations and configuration details. Use these flashcards to drill port numbers, protocol behaviours, and administrative distances. Pair flashcard sessions with Packet Tracer labs — when you encounter a card about OSPF neighbour states, open a lab and verify each state transition on a live topology. This combination of memorisation and practice builds the deep understanding Cisco exams demand.