[citation needed] He was also part of the DEC team that invented the Gigaswitch and the Giganet (a precursor to Gigabit Ethernet).
His work on scalable IP packet lookup (with Waldvogel and Turner) for longer addresses such as IPv6 is being considered for use by Linux.
[citation needed] George also worked with Eatherton and Dittia on the Tree bitmap IP lookup algorithm that is used in Cisco's CRS-1 router, which many[who?]
Tree bitmap and hypercuts (with Sumeet Singh and Florin Baboescu) appear to be among the best algorithms (excluding CAMs) for IP lookup and packet classification today.
[citation needed] Varghese co-founded NetSift Inc. (with Sumeet Singh) in 2004, serving as president and CTO.