Classification of Wireless Sensor Networks are as follows:

1. Static and Mobile WSN: All the sensor nodes are connected without movement and these are static networks in many applications. Some applications especially in biological systems- mobile sensor nodes are needed. These are called mobile networks. An example of a mobile network is animal monitoring. 

2. Deterministic and Nondeterministic WSN: In deterministic wireless sensor networks, the sensor node position is calculated and fixed.

The deployment of sensor nodes is possible in a limited number of applications. The position of sensor nodes determination isn’t possible because of several factors like harsh environments or hostile operating conditions. Such kinds of networks are non-deterministic and need a complex system. 

More info: What Is a Wireless Network?