Which NAS backup environment transfers data to be backed up over a private backup network?

A.
NDMP three-way

B.
NDMP two-way

C.
Server-based

D.
Serverless

Explanation:

NDMP 3-Way Backup

In the NDMP 3-way method, to avoid the backup data traveling on the production LAN, a separate
private backup network must be established between all NAS heads and the NAS head connected
to the backup device. Metadata and NDMP control data are still transferred across the public
network. Figure on the slide depicts NDMP 3-way backup. An NDMP 3-way is useful when backup
devices need to be shared among NAS heads. It enables the NAS head to control the backup
device and share it with other NAS heads by receiving the backup data through the NDMP.