A developer needs to use the current data network for socket data transmission, and the development process involves the following steps:

1。Send data with sockets.

2。Bind the network with NetHandle.bindSocket().

3。Call NetManager.getDefaultNet() to get the default data network.

4。Call NetManager.getInstance(Context9) to get the instance object of network management.

When the developer combed through the development steps, the above steps were sorted according to the order in which the features were completed in the code. Which of the following is the correct order?