*Question E2D08:
What type of packet frame is used to transmit APRS beacon data?*  

*Correct Answer is  C: Unnumbered Information*  

### AI Response: (may contain errors)  

In the context of APRS (Automatic Packet Reporting System), the correct answer is **Unnumbered Information**. Here's why:

1. **Why the correct answer is correct:**
   - APRS uses the AX.25 protocol, which is a packet radio protocol. Within this protocol, the **Unnumbered Information (UI) frame** is used for transmitting beacon data. This type of frame is ideal for APRS because it allows for the transmission of data without the need for establishing a connection or expecting an acknowledgment. This is efficient for broadcasting position reports, weather data, and other information typical in APRS.

2. **Why the other choices are incorrect:**
   - **Acknowledgement (A):** This type of frame is used to confirm the receipt of data in a connection-oriented communication. APRS does not require acknowledgments for its beacon transmissions, so this is not suitable.
   - **Burst (B):** This is not a specific type of AX.25 frame. The term "burst" might refer to a rapid sequence of transmissions, but it is not a frame type used in APRS.
   - **Connect (D):** This frame is used to establish a connection between two stations in a connection-oriented communication. APRS operates in a connectionless mode, so a connect frame is not used for beacon data.

3. **Useful Information:**
   - The AX.25 protocol supports both connection-oriented and connectionless modes. APRS takes advantage of the connectionless mode using UI frames to efficiently broadcast information to multiple stations without the overhead of managing connections.