clifford.network / toolbox
1844
Era I · Signals
29 Oct 1969 · 22:30 PST · UCLA → SRI
Host at SRI stopped responding after ‘O’

The Networking Multiverse

Charley Kline typed two letters of LOGIN before the far end crashed. Everything you send today travels down a branch of that moment. Follow eight strands, from the telegraph to 800 Gb Ethernet, and see where they cross, merge and get pruned.

Strands

Tap one to isolate it. Tap others to add them back.

Every network still starts with a change window

The rest of this site is free tools for the engineers who run them: a before-and-after checker, show-command filters, subnet maths with config, gotchas and proven designs. Plus a free Change Window Starter Pack.

Get the Starter PackOpen the toolbox