What is the difference between socks4 proxy and socks5 proxy?

[hipias5proxy DF Member Posts:78 Threads:49 Reputation 0]

Authentication mechanism: SOCKS4 only supports TCP protocol while SOCKS5 supports TCP/UDP protocol, 
supports various authentication mechanisms, server-side domain name resolution, etc. 
Although SOCKS4A also supports TCP/IP, it only supports username/password authentication.

Network protocol: SOCKS4 proxy only supports IPv4 protocol, while SOCKS5 proxy supports both IPv4 and IPv6 protocols.

link:http://www.piaproxy.com/?utm-source=demo...yword=?C01