Network Maintenance and Troubleshooting Guide: Field-Tested Solutions for Everyday Problems, Second Editon

Chapter 7. Transport Layer

Transport Layer protocols are used by the client or server host systems, and operate above and independently of the protocols and processes used at the Physical, Data Link, and Network Layers to move data between the source and destination host(s). (See Figure 7-1.)

Figure 7-1. The Transport Layer in relation to the other OSI Layers

The infrastructure network may manipulate, evaluate, or modify Transport Layer data in transit (referred to as being in flight), but this is due to reasons such as performance, load balancing, and security. Per the OSI Model, the Network Layer is responsible for end-to-end delivery and should ...