Introduction to the internet infrastructure
14 Topics | 1 Quiz UNDERSTANDING WEB BROWSERS
4 Topics URLs and Web Addresses
7 Topics Introduction to Email
3 Topics Email Etiquette and Safety
3 Topics INTRODUCTION TO SOCIAL MEDIA
3 Topics Understanding Online Security
3 Topics Cyberbullying and Online Etiquette
3 Topics Online Shopping and E-commerce
3 Topics 
Basic Architecture of the internet
The Internet architecture model though has five layers. The application, presentation, and session layers are combined into a single layer, and this combined layer is called the application layer. The interface between the application layer and the transport layer are the sockets. (Source: From Omscs notes)
