Which two are true about RMAN backups when using a media manager?
(Choose two.)
A.A media manager always writes RMAN requested backups to tape. B.By default, a request for a proxy copy may result in a backup set being created. C.A media manager is required to create RMAN proxy copies. D.A media manager is required to create RMAN image copies. E.The media manager layer (MML) routines provided by Oracle support any正确答案BC
Vendors' media management products.