Wireshark Fundamentals: A Network Engineer’s Handbook to Analyzing Network Traffic

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022

V. JainWireshark Fundamentalshttps://doi.org/10.1007/978-1-4842-8002-7_4

4. Analyzing Layer 4 Traffic

Vinit Jain¹  

(1)

San Jose, CA, USA

 

This chapter covers the following topics:

• Understanding the TCP/IP model

• Transmission Control Protocol

• User Datagram Protocol

Understanding the TCP/IP Model

We have already covered the OSI model, in which we learned about Layer 2 frames and Layer 3 packets and their importance when exchanging packets between two endpoints. This chapter focuses on the Transport layer (Layer 4) of the OSI model, which is responsible for transporting the data between the source and destination either via a connection-oriented or a connectionless ...