David P. Reed on the history of UDP
‘UDP was actually “designed” in 30 minutes on a blackboard when we decided pull the original TCP protocol apart into TCP and IP, and created UDP on top of IP as an alternative for multiplexing and demultiplexing IP datagrams inside a host among the various host processes or tasks. But it was a placeholder that enabled all the non-virtual-circuit protocols since then to be invented, including encapsulation, RTP, DNS, …, without having to negotiate for permission either to define a new protocol or to extend TCP by adding “features”.’
(tags: udp ip tcp networking internet dpr history protocols)
Oops: Instagram forgot to renew its SSL certificate
hooray for cert renewal pain
(tags: certs ssl renewal expiry instagram outages lifecycle web https)