Bluetooth

Bluetooth is often compared to 802.11, but is really distinctly different.
It was conceived as a wireless replacement for a wired Ethernet and was
developed by Ericsson with the assistance of Intel.
Technology Comparisons 19
Bluetooth provides point-to-point links without any native IP support,
meaning it cannot easily support point to point protocol (PPP). You
can create of a set of point-to-point wireless serial conduits, referred to
as RfComm, between the master machines and as many as six slave
machines using the session definiation protocol (SDP) to bind those conduits
to a specific driver or application.
Nodes must be explicitly connected, however they do recall bindings
each time they are used. Bluetooth does support TCP/IP as one profile
implemented through PPP on a given conduit. Additionally, there are
conduits for audio and other wireless applications as well.
The difficulty when comparing Bluetooth to any WLAN is that it does
not truly support applications including:


Native IP support

Cellular deployment

Connectionless broadcast interface

The most fundamental drawback is that Bluetooth doesn’t combine
TCP/IP and WLAN applications nearly as well as 802.11 does. In contrast,
Bluetooth is a good implementation for such applications as a
wireless universal serial bus (USB), something 802.11 has not been able
to accomplish as easily. This is because TCP/IP discovery mechanisms
and binding protocols can’t support wireless USB applications as well.