The exchange of information among dns servers regarding configured zones is known as:

The exchange of information among dns servers regarding configured zones is known as "zone transfer".

DNS zone transfer,  is a kind of DNS transaction. It is one of the numerous instruments accessible for managers to duplicate DNS databases over an arrangement of DNS servers.  

A zone transfer utilizes the Transmission Control Protocol (TCP) for transport, and appears as a client– server exchange. The customer asking for a zone exchange might be a slave server or optional server, asking for information from an ace server, in some cases called an essential server. The part of the database that is duplicated is a zone.

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.