Answer: Two direction
Explanation: Doubly linked list is a data structure which contains node's end linked with the start of the next node and also a previous pointer .These node persist two link fields and one data field in the doubly linked list.
The transversing as well as searching can be done in both direction. Inorder transversal (forward direction)and the reverse order (backward direction)transversal are the techniques through which the reversal is carried out in two ways.