Where and how does TensorFlow store its models (graphs)? Is it within the checkpoint files?
I know that in Caffe, the model is stored in a .caffemodel file, which is used for deploying (testing) the model after it has trained.
I just trained the model in this tutorial, and now have the following files in my /tmp/mnist_convnet_model directory:

What file(s) contain the actual model?
For instance, if I want to classify a single image using this trained model, what file is used for the classification?