Whether the user is interacting with a menu or a field in a form, the voice recognizer needs to have a frame of reference or a set of valid words and phrases (utterances) for these values.

A VLAN frame looks almost the same as an Ethernet frame; the difference is that a VLAN frame has an extra field containing a number that identifies the VLAN.

In Figure 7, we've added a field in addition to the time frame a user accesses the file to represent in which mode the file access is provided - whether the user is accessing for write or for read.