In ________, a classification method, the complete data set is randomly split into mutually exclusive subsets of approximately equal size and tested multiple times on each left-out subset, using the others as a training set

The key management mechanism that is used to distribute keys is coupled to the authentication and privacy mechanisms only by way of the _________

A) IAB B) SPI C) ESP D) SPD

All human-computer interfaces must have an interaction style and use some ________ for supporting this interaction

A) Database B) Network C) Hardware D) Software