Transport layer

As explained in Rust Servers, Services, and Apps

The transport layer provides communication between endpoints and transfers application data as a stream or sequence of transport-level units.

The transport layer provides reliable end-to-end communication between processes by sending and receiving raw bytes. It sits between application protocols such as HTTP and lower networking layers in the TCP/IP model. section 2.1

TCP is the transport-layer protocol used for the server and client implementation. It exchanges data as a continuous stream of bytes, without interpreting application message semantics such as HTTP requests. section 2.4

Basic TCP server and client

A Rust standard-library server and client exchange bytes over TCP. HTTP can operate above that connection, but message parsing and response construction belong to the application layer. section 2.4

Figure 2.1 TCP/IP network model

Use the TCP/IP network model to locate the transport layer between the application layer and lower networking layers. section 2.1

How Rust Servers, Services, and Apps covers it

How deep it goes

Defines reliable byte-stream communication and demonstrates a basic TCP exchange, stopping short of application-message interpretation.

Examples

Uses a Rust TCP server and client that exchange a continuous stream of bytes before introducing HTTP handling.

What it assumes

Assumes familiarity with client-server communication while introducing the four-layer TCP/IP model and separating transport from application semantics.

What you can do after

Build a basic TCP client and server that exchange bytes using the Rust standard library.

How it connects

Connects TCP with the TCP/IP model, application layer, HTTP, and network access and internet layers.

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Also explained in

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  Acing the CCNA Exam: Volume 1 Fundamentals and ProtocolsThe transport layer is the network-model layer that delivers data to a specific application process on a destination host.

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Related concepts

• TCPuses · TCP is a connection-oriented transport-layer protocol that provides reliable, ordered delivery of byte streams between network endpoints.
• UDPuses · UDP (User Datagram Protocol) is a connectionless transport-layer protocol that sends datagrams without guaranteeing delivery, ordering, or duplicate suppression.
• port numberuses · A port number is a numeric transport-layer identifier that directs network traffic to a service or application endpoint on a host.
• TCP/IP protocol suitepart of · The TCP/IP protocol suite is a layered family of networking protocols that enables addressing, routing, transport, and communication across interconnected networks.
• service layerused by · A service layer is a distinct software-architecture layer that provides application-level functionality or services through interfaces to other components or applications.
• OSI network modelpart of · The OSI network model is a seven-layer conceptual reference framework for organizing and describing network communication functions independently of specific implementations.

This explainer was generated by Manning's knowledge graph from the text of Rust Servers, Services, and Apps. The section links point to the parts of the book it draws on.