JavaRMI Alguém pode explicar?

package examples.rmisocfac;

import java.io.*;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;

public class HelloImpl implements Hello {
  
    public HelloImpl() {}

    public String sayHello() {
        return  "Hello World!";
    }
  
    public static void main(String args[]) {

	if (System.getSecurityManager() == null) {
	    System.setSecurityManager(new SecurityManager());
	}
	
        byte pattern = (byte) 0xAC;
	try {
	    /*
	     * Create remote object and export it to use
	     * custom socket factories.
	     */
	    HelloImpl obj = new HelloImpl();
	    RMIClientSocketFactory csf = new XorClientSocketFactory(pattern);
	    RMIServerSocketFactory ssf = new XorServerSocketFactory(pattern);
	    Hello stub =
		(Hello) UnicastRemoteObject.exportObject(obj, 0, csf, ssf);
	    
	    /*
	     * Create a registry and bind stub in registry.
	     *
	    LocateRegistry.createRegistry(2002);
	    Registry registry = LocateRegistry.getRegistry(2002);	
	    registry.rebind("Hello", stub);
	    System.out.println("HelloImpl bound in registry");
	    
	} catch (Exception e) {
	    System.out.println("HelloImpl exception: " + e.getMessage());
	    e.printStackTrace();
	}
    }
}