Douglas E. Comer is a professor at Purdue University, where he teaches popular computer networking courses. He consults for industry and teaches hundreds of professionals and diverse audiences around the world about the Internet at professional conferences and in onsite presentations. His series of books on networking and TCP/IP protocols receives high acclaim; his books are popular worldwide. One of the researchers who contributed to the formation of the Internet in the late 1970s and 1980s, he has served on the Internet Architecture Board, and is a Fellow of the ACM.