如何使用端口号识别协议？ [英] How to identify protocol using port number?

问题描述

如何使用端口号识别协议？



我知道端口号例如9995.如何识别此端口号使用的协议？

How to identify protocol using port number?

I know the port number say for example 9995. How to identify what protocol is used by this port number?

推荐答案

端口号是任意的，没有与协议的连接，你可以在端口110上托管网页。



通常端口号是为特定用途保留的，例如25 = smtp，110 = pop3,80 = http等。请参阅： http： //en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers [ ^ ]



要确定特定端口号上的协议，您需要进行数据包嗅探，这是一个高级主题。

Port numbers are arbitrary and have no connection to protocols, you can host web pages on port 110 for example.

Generally port numbers are reserved for specific uses like 25=smtp, 110=pop3, 80=http etc. see : http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers[^]

To determine a protocol on a specific port number you need to do packet sniffing which is an advanced topic.

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