0x07-networking_basics

0x07. Networking basics #0

Learning Objectives

General

OSI Model

• What it is
• How many layers it has
• How it is organized

What is a LAN

• Typical usage
• Typical geographical size

What is a WAN

• Typical usage
• Typical geographical size*

What is the Internet*

• What is an IP address*
• What are the 2 types of IP * address
• What is localhost
• What is a subnet
• Why IPv6 was created

TCP/UDP

• What are the 2 mainly used data transfer protocols for IP (transfer level on the OSI schema)
• What is the main difference between TCP and UDP
• What is a port
• Memorize SSH, HTTP and HTTPS port numbers
• What tool/protocol is often used to check if a device is connected to a network

Requirements

General

• Allowed editors: vi, vim, emacs
• All your scripts will be tested on Ubuntu 20.04 LTS
• All your files should end with a new line
• A README.md file, at the root of the folder of the project, is mandatory
• The first line of all your files should be exactly #!/usr/bin/env bash
• All your scripts must be executable.
• Your Bash script must pass shellcheck without any error
• The first line of all your Bash scripts should be exactly #!/usr/bin/env bash
• The second line of all your Bash scripts should be a comment explaining what is the script doing