UUID and MACAddress for Bluetooth BLE

Question

I must confess I am a newbie when it comes to BLE 4.0, and I want to understand what comprises a unique identifier for a BLE peripheral. Generally, for all WiFi communications,

Answer 1

BLE devices have unique 6 byte Bluetooth addresses just like regular Bluetooth. This uniquely identifies the device. However, BLE can also use "random" addresses which follow a specific format so you can tell when you have a random addresses as opposed to a regular public address.

• In the BLE vernacular, "UUID" refers to the identification codes to identify the data types found in the Generic Attribute Protocol (GATT)
• Not sure I understand this question... There's the Bluetooth address, but again, BLE devices can use random addresses.
• Well, when you do a scan for advertising packets you receive packets that contain the Bluetooth addresses. Those addresses are what you use to connect to a specific device.
• You have to manually make connections to devices when you want to "connect". However, advertising packets can contain data which you can receive passively without any sort of connection. iBeacon's use the connectionless advertising packet information and so no connections are made.