CHAPTER 11
Layer 4 Protocols
Chapter 10 discussed the Linux IPsec subsystem and its implementation. In this chapter, I will discuss four transport layer (L4) protocols. I will start our discussion with the two most commonly used transport layer (L4) protocols, the User Datagram Protocol (UDP) and the Transmission Control Protocol (TCP), which are used for many years. Subsequently, I will discuss the newer Stream Control Transmission Protocol (SCTP) and Datagram Congestion Control Protocol (DCCP) protocols, which combine features of TCP and UDP. I will start the chapter with describing the sockets API, which is the interface between the transport ...
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