ABSTRACT
This chapter provides an introduction to Licklider Transmission Protocol (LTP). The position of LTP within a typical protocol hierarchy is covered as well as protocol encapsulation within an example hierarchy. The chapter provides a detailed look at the structure and content of LTP segments. It also provides sender and receiver state transition diagrams. The chapter covers the security mechanisms currently built into the LTP protocol. It gives the reader with a comprehensive understanding of LTP, including the methods LTP employs to achieve dependable communication over unreliable networks. The chapter explains a number of features factored into the design of LTP which optimize transmission of data over long-haul space network links. The LTP blocks are then broken down into segments, which are queued for transmission to the destination node. When a node receives a data segment containing a green-part, this procedure simply triggers a "green-part segment arrival" notice to the client service.
