ARPA Updated +Created
Old name for DARPA before 1972, and again for a short time between 1993 and 1996. That's why ARPANET is called "ARPANET" and not "DARPANET".
Making the Cisco connection Updated +Created
Nothing phenomenally new on the early days to add on top of Video "Nerds 2.0.1 excerpt about Cisco (1998)", but a few new good points: