BitTorrent: A popular file-sharing protocol that people often use to distribute copyrighted video. The itself isn't illegal, but using it to download TV shows and movies that were released under the usual copyright protections generally is.

Component video: A common set of analog ports (red, green, and blue) for high-def video. Technically, a component-video connection can deliver video up to 1080p resolution ("Full HD").

Composite video: The ubiquitous red-white-yellow ports are for composite video. However, because composite video (an analog format) cannot deliver high-def video, avoid using composite-video ports whenever possible.

DisplayPort: A newer display connector employed primarily for connecting laptop and desktop PCs to computer displays. But don't expect to use it to connect your PC to your TV--at least not at this point.

DLNA: Digital Living Network Alliance. DLNA is a standard that enables your HDTV, PC, and other gadgets to talk to one another and share media over a network. For example, an Xbox 360 hooked up to your HDTV can stream video located on your desktop PC in your home office.