Summary of 서버 측 JS - 간단한 웹앱 만들기 2 - 인터넷의동작방법

00:00:00 - 00:10:00

In this YouTube video titled "서버 측 JS - 간단한 웹앱 만들기 2 - 인터넷의동작방법}", the instructor discusses important concepts related to internet communication and the basics of client-server internet communication. The concepts covered are server and client, IP address and port, network and protocol, and HTTP. The internet is the result of the emergence of interconnected computers beginning in the 1960s, revolutionizing the way we interact with technology today. The video explains that domain names map to specific IP addresses, which are called IP addresses, and discusses different types of servers and their respective ports. It emphasizes the significance of specifying the correct port number in the URL for successful communication between the client and the server, making it crucial to be aware of port number requirements.

• 00:00:00 In this section, the instructor discusses the topic of the internet and its related concepts. The four main concepts they will cover are server and client, IP address and port, network and protocol, and HTTP. The instructor explains that these concepts are important for understanding how computers communicate over the internet and how data is transferred between them. They also mention that the internet is the result of the emergence of interconnected computers beginning in the 1960s and that it has revolutionized the way we interact with technology today.
• 00:05:00 In this section, the speaker explains the basics of client-server internet communication. He first states that accessing a computer's IP (Internet Protocol) address is the basic way to connect to it. He then discusses the concept of a domain name, which is a human-readable way of remembering an IP address. The speaker explains that domain names map to specific IP addresses and that these IP addresses are called IP addresses. He also talks about different types of servers, such as data base servers, chat servers, game servers, and web servers, and how multiple servers can be installed on a single computer. The speaker then talks about ports and how they are used to connect clients to different servers. He explains that each server application is connected to a specific port and that clients must connect to the correct port in order to interact with the server. He also talks about the concept of web browsers and how they connect to servers using the HTTP protocol. The speaker then discusses how a user would connect to a specific server using HTTP, by entering a specific URL into their web browser. He also explains how the computer would connect to the correct IP address and port and that the server would respond to the request. The speaker concludes by stating that domain names make it easier for humans to remember IP addresses and that ports are used to connect clients to different servers.
• 00:10:00 In this section, the video explains the significance of specifying a port number when connecting to a web server. The video explains that the port number is typically specified with the protocol (HTTP, HTTPS, etc.) followed by a colon, followed by the port number (e.g., 80, 443). The video emphasizes that this port number conventions are standard and widely used, which makes it easier to connect to a web server. The video goes on to explain that if a specific port number is required to connect to the server, it should be specified in the protocol followed by the port number. For example, to connect to a server that requires a port number of 1337, the URL should be in the format of HTTP://<server IP address>: 1337. Finally, the video clarifies that the use of the port number is crucial for successful communication between the client and the server. Therefore, it is crucial to be aware of the port number requirements and specify the correct port number in the URL.