TCP/IP mostly came form Stanford, Xerox (PARC again!), and UC London.
Then it got useful for local networks with work on Ethernet from, where else, PARC, U Hawaii, and UICU (which now prefers UIUC just to annoy us NovaNET alumni).
And the University of Illinois at Urbana-Champaign has a largely ignored history of contributions to modern computing and Internet capabilities, from Ethernet to instant messaging to computer-based training, lots of interesting stuff.
And many alumni that were powerhouses early on; Marc Andreessen, Ray Ozzie, Don Bitzer, Steve Chen, Lemuel Davis, Bob Miner,Larry Ellison, and a few others
At one time Microsoft hired more from UIUC than any other school.