server

The developer observes that some information is not delivered at the client end. He
tries using the following code to create a reliable connection between server and
client:
public Server()
{
try
{
serverSocket = new ServerSocket(1001);
System.out.println(serverSocket.toString());
}
catch(IOException e)
{
System.out.println("Error Starting the Server . . .");
}
System.out.println("Server started . . .");
this.start();
}
The developer writes the following code for client:
public client()
{
try
{
Socket clientSocket = new Socket("192.168.0.70", 1002);
}
catch(UnknownHostException e)
{
System.err.println("Unidentified hostname");
System.exit(1);
}
}
However, the developer observes that clients are able to connect to the server only
when the server and clients exist on the same machine. But, when a client executes
on a different machine then an exception is thrown at client end. What is the cause of
this behavior of the preceding code snippet?