
The foundations: Blob with immutability, Azure Files, VNet, ExpressRoute and Front Door — where the architecture plays its match.
Every Azure architecture rests here: Blob Storage with hot/cool/archive tiers and WORM immutability for backups, Azure Files for SMB shares, VNets and private endpoints for the perimeter, ExpressRoute for the direct wire to the data center, Front Door and Application Gateway to publish safely.


The network topology that scales: a shared hub (firewall, ExpressRoute), spokes per environment.
Lifecycle policies on Blobs: data slides from hot to archive on its own, the bill goes down.
Time-based retention on the vaults: the copy no stolen credential can delete.
Egress and NAT under control: network costs are designed, not discovered on the invoice.
Storage accounts choose their redundancy (LRS→ZRS→GRS/GZRS with RA-*) and blob tiers (hot/cool/cold/archive) with automatic lifecycle; immutability (time-based/legal hold) armors the backups. The network is drawn hub&spoke: a hub with firewall/ExpressRoute, spokes per workload, private endpoints for the PaaS, centralized private DNS; ExpressRoute reaches 100G with FastPath, global peering connects the regions.
The foundations of every well-done Azure adoption.
The immutable shore of the 3-2-1 strategy.
Apps exposed with WAF and network zero trust.