What is the difference between socks5 agent and socks4 agent?

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1. Both Socks4 and Socks5 belong to the Socks protocol, but the specific applications they support are different.

2. Socks4 Agent only supports TCP applications, while Socks5 Agent supports TCP and UDP applications.

However, because the Socks5 proxy also supports various authentication mechanisms, server-side domain name resolution, and so on; the Socks4 proxy is not supported, so the Socks proxy is usually the Socks4 proxy.

3. UDP applications are not usually supported.

In other words, Socks5 can also be done what Socks4 can do, while Socks4 that socks5 can do may not be able to do well.

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