Author an aligned allocation manifest

Objectives

Halcyon Clinics must allocate imaging, staff and telemetry networks inside one /24. The service owner calls the telemetry broadcast address its 'last host' and asks you to copy it into the assignment manifest. Recalculate rather than copying the label.

Use the smallest sufficient ordinary subnet for each demand, allocating largest-first at the lowest available aligned address. Fill every field with exact numeric values or dotted-decimal addresses and CIDRs as appropriate. Demands include gateways and all infrastructure; there is no additional reserve. Record telemetry's full host boundaries and the exact free block left over.

parent: 198.51.100.0/24
imaging_required_usable: 100
staff_required_usable: 50
telemetry_required_usable: 20
placement: largest-first, lowest available aligned address
owner_note: telemetry broadcast is its last assignable host

Step-by-step hints

The guided walkthrough, in full. It is free: no XP cost, and it does not touch the paid hint ladder or the reveal gate.

1. Step 1

   Size then place the largest service

   Find the least host-bit count meeting the largest total after endpoint reservations. Place that block at the beginning of the approved parent and record its usable capacity.

   Largest demand has its minimal aligned block and capacity

2. Step 2

   Continue the allocation

   Repeat the sizing calculation for the remaining services in descending order. Start each at the lowest free address that satisfies its own alignment; verify the intervals never overlap.

   Staff follows without overlap and meets capacityTelemetry uses its minimal remaining aligned block

3. Step 3

   Separate boundaries from assignments

   For the final service, derive the all-zero and all-one host-bit addresses. Move inward from those reserved endpoints to identify the assignable range rather than trusting the owner's terminology.

   Telemetry network and broadcast are exactTelemetry first and last usable hosts exclude reserved endpoints

4. Step 4

   Reconcile the parent

   Subtract the allocated intervals from the parent. Express the leftover interval as a canonical network and prefix; verify its union with the allocations reconstructs the parent exactly.

   Remaining address space is recorded as one exact CIDR

Rules summary

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