問題文
An unauthenticated caller who has reached the voice messaging platform names a number and asks to be put through to it. Which table does the platform weigh that number against, and what does that table permit before anybody has edited it?
選択肢
- The table meant for transfers that a caller names, and it permits no number at all until somebody edits it, in that a table of that use is there to guard against toll fraud.
- The table meant for message notification, and it permits any number that is shorter than the length of an extension until somebody has edited it, in that a table of that use is weighed by length alone.
- The table meant for transfers that a user of the platform names, and it permits no number at all until somebody edits it, in that a table of that use is tied to the class of service of the caller.
- The table meant for message notification, and it permits no number at all until somebody edits it, in that a table of that use exists to shut out fraudulent calling.