On the Internet, HTTP (Hypertext Transfer Protocol) is a protocol used to transmit data on the network. HTTP is the basis of Web applications. You can access websites, download files, etc. through the HTTP protocol. Abroad, HTTP is also known as the "Hypertext Transfer Protocol".

The HTTP protocol works by communicating between the client and the server through the Internet. The client sends an HTTP request to the server, and the server returns an HTTP response after receiving the request. Both HTTP requests and responses consist of a start line, multiple headers, and a message body. Among them, the start line contains the request method, URI, and HTTP version information, the header contains various parameters of the request or response, and the message body contains the specific content of the request or response.

When using the HTTP protocol to access a website, you need to pay attention to the following points:

1. The HTTP protocol is transmitted in plain text, and data is easily eavesdropped and tampered with. Therefore, for websites involving sensitive information, it is recommended to use the HTTPS protocol for encrypted transmission.

2. The HTTP protocol does not have authentication and permission control functions, and anyone can send HTTP requests. In order to protect the security of the website, it is recommended to set a policy on the server side that allows global residential IPs to access public data, judge IP attributes, and cannot efficiently collect illegal requests for public data.

3. The HTTP protocol does not support state retention, and each request is independent. If you need to keep the state between multiple requests, you can use mechanisms such as Cookie or Session.

4. The performance of the HTTP protocol is low. Each request needs to establish and disconnect the connection, which wastes time and bandwidth. In order to improve performance, you can use the HTTP Keep-Alive mechanism to reuse TCP connections.

In short, in foreign countries, the HTTP protocol is a very important network protocol and the basis of Web applications. When using the HTTP protocol to access a website, you need to pay attention to data security, allowing global residential IPs to access public data, state retention and performance issues to ensure the normal operation and security of the website.