# Module 4 Overview

## Module Overview

## Internet Basics and Network Security

### Module Overview

In this module we will provide a brief overview of how the Internet works; basic terminology that goes with Internet and Networking and discuss the importance of protocols. We will go over the 7-layer OSI model for networks and utilize a network sniffer called "Wireshark" to capture the traffic in the network we are connected to. We will analyze the traffic we captures to get information about cipher used during the the connection as well as the certificate details. We will discuss various types of attacks to a network and tools to defend against them.

### Module Objectives

By the end of this module you should be able to:

1. Demonstrate basic understanding and knowledge of the concept of Internet such as IP address, DNS, Network Layers, Protocols (CO1)
2. List different types of network attacks and defenses against them. (CO2,CO3)
3. Utilize network defense tools in a simulated environment.(CO3,CO5)
4. Utilize the network sniffer Wireshark to capture the network traffic.(CO5)
5. Analyze network traffic to get the cipher and certificate information.(CO5)
6. Learn about secure and insecure network protocols (telnet and ssh) by hands on activities(CO5)

## Task List

- The tasks required for this module are included in each submodule.

The tasks included in this module are:

Online:

1. Watch "How the Internet Works" videos from code.org
2. Read Chapter 10 in the textbook
3. Complete the Quizzes 8 and 9 (MO1,MO2)
4. Complete the lab Protocols and Default Network Ports (MO6)
5. Complete the lab "Cyber Protect" by DoD (MO3) (?)

In class:

1. Presentation of Internet and Networking Basic
2. Presentation of Phases of an Attack
3. Presentation of Network Security
4. Hands on: Windows cmd line: ipconfig, ping, tracert, nmap,wireshark
5. Hands-on: Capturing Network Traffic and extracting the ciphers used using Wireshark (MO4)