Introduction to TCP IP Networking 

In this video, the speaker introduces the concept of TCP/IP networking, starting with the basic definition of networking. Networking is defined as the connection of two or more computers through a shared medium, allowing resource and file sharing. Various mediums can be used, including cables and wireless options like satellites and Wi-Fi. The speaker emphasizes that devices and software in a network follow specific rules, known as protocols or standards, which dictate how each device and network part operates. The discussion then shifts to networking models, which are divided into layers. For instance, the TCP/IP model has four layers, while the OSI model has seven. Each layer operates with different protocols, such as HTTP, FTP, and HTTPS at the application layer, and TCP and UDP at the transport layer. The speaker also mentions the session layer, data link layer, and the physical layer, where various protocols like IP and ICMP function. The speaker highlights that the TCP/IP model is widely used across different devices and operating systems, including mobile phones, mainframe computers, Linux, and macOS, for communication. The video concludes with a note that the upcoming exam will focus on TCP/IP, and the speaker has created a playlist for further learning on the topic.