Explained: CIDR

You spin up a VPC in AWS and it asks for a CIDR block. You type 10.0.0.0/16 because that's what the tutorial said. Then you create a subnet and it wants another one, so you put 10.0.1.0/24 . It works. You move on. Six months later somebody asks why the subnet can only hold 251 usable addresses when you asked for 256, and whether 10.0.1.0/24 overlaps with the 10.0.0.0/22 block the networking team just allocated. You don't know. Nobody does.… Read More

Explained: AWS Global Accelerator

The failover drill was supposed to take five minutes. At 2:00 a.m. the team failed the primary region on schedule, the Route 53 health check noticed within seconds, and the DNS answer flipped to the standby site exactly as designed. Twenty minutes later, the dashboards told a different story. Nearly half the clients were still connecting to the dead region. Nothing was misconfigured; every layer was doing exactly what it was built to do. The reco… Read More

Architecture: Amazon Bedrock AgentCore

On July 30, 2026, Amazon Bedrock Agents, the service AWS launched in 2023 for building tool-using AI agents, closes to new customers. AWS has renamed it Bedrock Agents Classic and pointed everyone at its successor. If your team demoed an agent prototype this quarter, someone is about to ask you what it should actually run on in production. The answer AWS wants you to reach is Amazon Bedrock AgentCore . That deadline is a good excuse to understand … Read More

Explained: Amazon Bedrock

Your product manager wants an AI feature. Nothing exotic: summarize support tickets, answer questions over internal docs. You prototype it against a model provider's API in an afternoon, and it works beautifully. Then the review starts. Security wants to know exactly where prompts and customer data go. Legal asks whether your data will be used to train someone else's model. Procurement wants three weeks to onboard a new vendor. Networkin… Read More