# Would this be considered an internal node?

n1 was the only internal node the textbook talked about, but would the small upside down L shaped node connecting B's node to E1 be considered an internal node? As well as the other upside down L shaped node directly below n1?

They are not internal, as they are directly exposed to the inputs/outputs. (The first one is the same as B input, the second one is the same as Z output.