One borrowed bit, one cut — names change, addresses don’t move
Every click borrows one host bit: the number of subnets doubles and each one halves. The tree cannot cut anywhere except a binary boundary — and neither can you.
Borrowed bits
—
New prefix
—
Subnets
—
Addresses each
—
The block, cut — outside the world still sees one route
Every piece is a block, and its name is its own first address
bitsarebits.com · CSE 316 — Data Communication & Networking · Forouzan §18.4