There are many types of proxy servers. The most common are the following basic types:
1. HTTP proxy: can proxy client HTTP access, we browse the web page, download data is to use HTTP proxy. Its ports are 80, 8080, 3128, and so on.
2. HTTPS proxy:
HTTP protocol is not encrypted in the process of transmission. If private files are transmitted, there is a risk of insecurity. In fact, HTTPS is a network protocol based on SSL and HTTP. It encrypts the transmission process and is more secure than HTTP. HTTP and HTTPS use different ports. HTTP uses port 80, HTTPS uses port 443, and of course the connection is completely different. HTTPS and SSL support x.509 digital authentication so that the user can confirm who the sender is if needed.
3. SOCKS proxy:
(1) A proxy server that uses the SOCKS protocol is a UNIVERSAL proxy server. SOCKS proxies are different from other types of proxies in that SOCKS do not require the application to adhere to a specific operating system platform. SOCKS proxies simply deliver packets regardless of the application protocol, so SOCKS proxy servers are much faster than other types of proxies.
(2) SOCKS proxy is classified into SOCKS4 and SOCKS5. The difference is that SOCKS4 supports only TCP (transmission control Protocol), while SOCKS5 supports BOTH TCP and UDP (user data packet protocol), and supports various authentication mechanisms and server domain name resolution. SOCKS5 can do socks4 can get, but SOCKS5 can do SOCKS may not do.
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