如果您要明确指定一台远程主机，您可以通过调用PseudoRemThr对象的另一个构造函数来完成。
If you want to explicitly specify a remote host, you may do so by calling a different constructor of the PseudoRemThr object.
知道了这一点，假设攻击者构造了一条IC MP回应消息，它的头中包含伪造的任意主机a的源地址，如192.168.2.2。
Knowing this, imagine that an attacker constructs an ICMP echo message containing the spoofed source address of some arbitrary Host a, such as 192.168.2.2, in its header.
此方法将通过URIConstants在客户机和服务器已知的主机编号上构造一个套接字，该套接字以本地主机上的TCP服务器为目标。
This method constructs a socket targeted to the TCP server on the localhost at a host number known both to the client and server through URIConstants.
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