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Technology & Architecture
Three-Tier Campus Network Architecture
Three-tier campus architecture (access/distribution/core): roles, collapsed core, SD-Access, campus EVPN-VXLAN, and sizing.
April 15, 2026
Technical resources
Original optics, documented by reference.
Buying guides, technical notes and manufacturer-reference resources for professional optical links.
Editorial scope
SFP through QSFP-DD · original manufacturer references · selection boundaries · procurement context