A port number of zero will let the system pick up an ephemeral port in a bind operation.
端口号为0意味着系统在绑定操作时选择一个临时端口。
Typically, ephemeral ports (that is, those used only briefly) are allocated to port Numbers 1024 through 5000.
通常，分配的短暂端口(即暂时使用的端口)号范围从1024到5000。
ORB listener ports are, by default, dynamically determined from the platform’s ephemeral port range at run time.
缺省情况下，ORB侦听器端口是在运行时从平台的临时端口范围中动态地确定的。
A convenient way to find a free port is to pass in a null address, which automatically binds the socket to the local host address and USES a free ephemeral port.
找到空闲端口的便利方法是传递一个null地址，它会自动将套接字绑定到本地主机地址，并使用空闲的临时端口。
A convenient way to find a free port is to pass in a null address, which automatically binds the socket to the local host address and USES a free ephemeral port.
找到空闲端口的便利方法是传递一个null地址，它会自动将套接字绑定到本地主机地址，并使用空闲的临时端口。
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