### AWS Reserved Subnet IPs
In every subnet, AWS reserves 5 IP addresses (first four and last one) for network, router, DNS, future use, and broadcast. A /24 has $256 - 5 = 251$ usable host addresses.

Python 3.11

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Interactive Challenge

+70 XP

Challenge Objective

Compute usable AWS subnet IPs and print 'USABLE_IPS: 251'.

solution.py

UTF-84 SpacesAuto-saved

cpython3.11:~/workspace

CPython 3.11.8 (WASM)

$python3 -u solution.py

Click "Compile & Run" (or press Ctrl + Enter) to compile AST, verify bytecode, and execute the solution.

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Module 1: Global Infrastructure & VPC Networking•Lesson 1

1.1 CIDR Subnet Calculation & IP Allocation