Tag
cidr
- Aug 16, 2025 CIDR Aggregation and the Reasons It Cannot Fully Summarize How prefix length replaced address classes, which blocks can be merged into one announcement, and why holes and multi-homing leave the table larger than the address plan suggests. networking
- May 1, 2025 VPC Address Space, Subnets, and the Implicit Router How a CIDR block becomes an isolated forwarding domain, where the router joining its subnets actually runs, and why several addresses in every subnet are never usable. cloud infrastructure
- Nov 4, 2024 Classful Addressing, Subnets, and the Move to CIDR Why the fixed class A, B, and C boundaries wasted most of the IPv4 space, how subnetting borrowed host bits, and what prefix aggregation changed about routing. computing history