The latest research suggests that Alzheimer's may be linked to problems with switching this "default network" on and off effectively.

BBC: NEWS | Health | Alzheimer's linked to daydreams

There is also mounting evidence to support the existence of a "default network" in the brain - a set of interconnected areas responsible for routine, passive mental processes.

BBC: NEWS | Health | Alzheimer's linked to daydreams

The Linux "zombie" machines were compromised when hackers broke into them by exploiting a default setting for the network file system through an RFC buffer overflow, Rouland explains.

CNN: New denial-of-service attack tool uses chat programs

Toss in those considerable network speeds and default access to Internet Sharing and, suddenly, it's a shining star.

ENGADGET: Nokia Lumia 900 review Mobile

With Path the network is always by default private.

FORBES: Path Relaunches As All-In-One Mobile Smart Journal

Our lives used to be private by default, yet with the advent of each new social network, privacy has become increasingly difficult to preserve.

FORBES: Chatroulette gets less anonymous with addition of Missed Connections

Automatic WiFi Security: The integrated router comes with wireless security turned on out-of-the-box, complete with a pre-configured network name and password, protecting home WiFi networks by default.

ENGADGET: Netgear D6300 mates 802.11ac WiFi with ADSL, risks one heck of a mismatch

For one, Dish Network or DirecTV might do a deal with Apple to offer consumers who normally default to their local cable company another reason to give them a try.

FORBES: Third in a series.

Facebook also makes some money off Facebook games like Farmville, which share revenue with the social network, but is hoping to move beyond just Zynga to become the "default" platform for mobile games from all developers.

CNN: Facebook mobile users surpass desktop users for first time