Does bluetooth support tcp/ip?

I noticed that some phones support "tethering" over bluetooth connection. I am trying to figure out:
1. Does bluetooth support tcp/ip?
2. If not, how can phones link tcp/ip based cellular netwroks with bluetooth networks? Is there a form of address translation?

Thank you, experts!
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Paul MacDonaldDirector, Information SystemsCommented:
"BNEP is used to transport common networking protocols over the Bluetooth media such as IPv4 and IPv6."

Bluetooth itself has nothing to do with TCP/IP.
It's merely a data connection. What you get with tethering is just getting the data between one point to the other, but NOT BY TCP/IP. It's more like a one on one modem connection (which basically is also just a data connection).
TCP/IP is for big networks, bluetooth is just a low rate data cable replacement.
cyber-33Author Commented:
Paul, this is very helpful - thank you. So, does BNEP encapsulate TCP/IP?

For example, when the phone is used as a bluetooth hotspot (PAN profile - I think), multiple bluetooth devices can connect to it, correct? If so, how does the phone map incoming tcp/ip packets to receiving bluetooth devices?
Paul MacDonaldDirector, Information SystemsCommented:
"So, does BNEP encapsulate TCP/IP?"
That's what the article says.  One presumes the protocol allows for some sort of NAT, but I don't know for sure.
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