# Module 5: Introduction
## Summary
This module introduces connection and network security.
## Learning Goals
- Know what a network protocol is and the layers at which it can operate.
- Know the main network protocols and the circumstances in which they are used
- Understand some common security problems in computer networks and how to mitigate them
## Table of Contents
- [Computer Networks](https://osf.io/qukj4/wiki/Module%205%2C%20Part%202:%20Computer%20Networks/)
- [Common Security Issues and Countermeasures](https://osf.io/qukj4/wiki/Module%205%2C%20Part%203:%20Security%20Issues/)
# Presentation Slides
Example presentation slides for this module can be found [here](https://osf.io/86nep).