SIGCOMM Award Winner
After receiving his Ph.D., Dr. Clark worked on the Multics operating system and on the ARPAnet, managing the development of one of the first host implementations of the ARPA network protocols. Following this effort, he worked on local area network technology, and was one of the developers of key token ring LAN concepts, which directly led to commercial products and helped stimulate the IEEE 802.5 token ring standard.
Since the mid 1970s, Dr. Clark has been involved in the development of the protocol suite TCP/IP or Internet. He did the first implementation of these protocols for the Multics system, and for the IBM PC. From 1981-1989 he acted as Chief Protocol Architect for the Internet, and chaired the Internet Activities Board. He guided the design and implementation of the SWIFT operating system at MIT, which demonstrated that a major impediment to effective data throughput is the internal structure of existing operating systems. He currently heads the Advanced Network Architecture research group at the MIT Laboratory for Computer Science.
As a part of his work in protocols, Dr. Clark has made an extensive study of protocol efficiency. His investigation of protocol overhead has led to a new set of principles for protocol organization which supports easier implementation of high-performance systems. His current research interests are protocols and architectures for very large and very high speed networks. Specific activities include the development of methods to support real-time traffic in the Internet, and new models of network service to support distributed information systems. In the security area, Dr. Clark participated in the early development of the multilevel secure Multics operating system, and consulted on the development of SDNS, a secure version of the Internet architecture. He developed an information security model derived from commercial practices, a model which stresses integrity of data rather than disclosure control. He chaired a study committee of the National Academy of Sciences on computer and communications security.
Dr. Clark is a member of the IEEE and the ACM. He received the ACM SIGCOMM award in 1990 and the IEEE Award for International Communications in 1995 for his work on the Internet.