Well, to make a long story short, Bob Kahn is Jewish!
Since Bob Kahn's mother is Jewish, and in Orthodox Judaism and Conservative Judaism, those with a Jewish mother (or those who underwent a halakhic conversion) are considered Jewish, then that makes him Jewish. His father is Jewish too.
Bob Kahn (whose full birth name is Robert Elliott Kahn) was born on December 23, 1938 in Brooklyn, New York.
He is best known for inventing the Transmission Control Protocol (TCP) and the Internet Protocol (IP) along with Vint Cerf. These fundamental communication protocols are the heart of the Internet technology.
If you see any details that require update, please Let us know!