Which of the following statements BEST describes a Definitive Media Library (DML)?
A. A secure location where definitive hardware spares are held
B. A secure library where definitive authorised versions of all media Configuration Items (CIs) are stored
and protected
C. A database that contains definitions of all media CIs
D. A secure library where definitive authorised versions of all software and back-ups are stored and
protected

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跟大家交流一个ITIL的概念吧：ITIL先锋论坛是目前国内ITIL最大的论坛，为满足广大论坛网友的ITIL培训需求，在北京不定期举办ITIL培训课，包括了ITIL Foundation课程、ITIL想论坛独有的落地培训课程、ITIL Expert认证培训课程。论坛网友可以在ITIL先锋论坛的qq群中进行报名北京ITIL培训。