2). The HTTP proxy server connects requests through HTTPS (Hypertext Transfer Protocol Secure), uses port 443, and supports X.509 digital authentication.
3). The Socks proxy is a proxy server that connects requests through the SOCKS protocol. It is a general proxy server and is usually bound to port 1080 of the proxy server.
Since the Socks proxy uses the SOCKS protocol, it is faster than other application layer proxies. Socks proxy is usually bound on port 1080 of the proxy server. If you are on an enterprise or campus network and need to access the Internet through a firewall or proxy server, you may need to use SOCKS. Usually, dial-up Internet users do not need to use SOCKS. Note that the proxy server commonly used when browsing the web is usually a dedicated HTTP proxy, which is different from SOCKS. Therefore, just because you can browse the web does not mean you must be able to access the Internet through SOCKS. Commonly used firewalls and proxy software support SOCKS.