good to know:
"
0.0.0.0 to 0.255.255.255
Broadcast addresses. These are used to send traffic to hosts on the current network.


27.0.0.0 to 127.255.255.255
Loopback addresses. 127.0.0.1 is used to loop back to the current host (so if you try to make a network connection to that address, you are talking to yourself).


69.254.0.0 to 169.254.255.255
Link local addresses. These are used for hosts that have to assign their own IP addresses.
"

"In 1970, the University of Hawaii created a wireless network called ALOHANET."

bluetooth security options: security mode 1 or security mode 2