Transport layer protocol designed at Bell Labs originally as part of the Plan 9 operating system and used to carry 9P. It is assigned the Internet Protocol number of 40. It is similar to TCP but much simpler.

Its main features are:

• Reliable datagram service
• In-sequence delivery
• Internetworking using IP
• Low complexity, high performance
• Adaptive timeouts

External links

• —The original paper describing IL

Internet protocols | Transport layer protocols | Plan 9 from Bell Labs | Inferno

IL Transport Protocol