IP
IPsec tunnels with dynamic routing
Tunnels in the Internet Architecture
Bill of Internet Access Rights
UDP
Options for UDP
TCP
Extended option space
Decoupled port/service identifiers
Automatic initial windows
Idle burst avoidance
Shared use of experimental options
Control block sharing
Distributed Active Measurement Environment (DIME)
Other
A file system interface to configure network parameters on host operating systems.
Active Learning Networks (ALN)
Used AI to tune TCP.
Scalable Personal Teleconferencing (SPT)
Extending teleconferencing for large groups.