Systems jargon buster
Universal Plug and Play (UPNP) is a series of protocols that allow devices easily to discover and communicate with each other over a network to share information.
DLNA focuses on media formats and management, allowing content (video, audio, pictures, etc) to be shared across devices, with the user able to manage said files. Most DLNA tagged devices are UPNP capable too.
Cd-quality refers to the resolution of an audio CD, which is 16-bit/44.1khz. Cd-quality should not be confused with high resolution audio.
High-resolution audio has a higher sampling frequency and bit rate than Cd-quality audio. Hi-res files tend to use a range of sampling rates, the most common being 96khz and 192khz at 24-bit.
NAS – Network Attached Storage – is an intelligent storage device. Content stored on a NAS can be accessed through a media streamer via a network.