Get started with Wireshark - Wireshark demo show TCP and UDP

Let’s get started with Wireshark. This post constitutes a short Wireshark demo to show TCP and UDP in action in a real network. This post complements the CCNA lesson on TCP and UDP: CCNA 200-301 TCP & UDP study notes (Comparing TCP to UDP). This post is part of my CCNA 200-301 study notes.

For a more frequently updated version of this post: How to get started with Wireshark.

Introduction
Wireshark demo
Wireshark analysis
TCP SYN message
UDP message
Getting started with Wireshark exercise
Resources for getting started with Wireshark/network troubleshooting
Key references

You may also be interested in Comparing TCP to UDP.

Introduction

Using Packet Tracer’s simulation mode you can analyze packets to some extent, but not at the same level as Wireshark. Packet Tracer is a network simulator but Wireshark is a packet capture program that lets you analyze network traffic. Wireshark is useful for education and training and is also a very useful network analysis and troubleshooting tool.

We have looked at Wireshark captures earlier in the course, but we have not been properly introduced. Although there is a lot you can learn about Wireshark, it’s quite easy to get started using it.

Up here you can see the packets as they are sent or received by the network interface you are capturing traffic from:

(Please finish reading this post in the embedded Google Doc below.)