Which of the following is included in packet radio transmissions?
A check sum that permits error detection
A check sum that permits error detection is part of packet radio to ensure data integrity by confirming that the data has been transmitted without errors.
A header that contains the call sign of the station to which the information is being sent
A header that contains the call sign of the station to which the information is being sent is essential for directing the packet to the correct recipient station.
Automatic repeat request in case of error
Automatic repeat request (ARQ) is included in packet radio to enhance reliability by enabling retransmissions of data packets that were received with errors.
All these choices are correct
This answer is correct because packet radio transmissions include a check sum, a header with the recipient’s call sign, and automatic repeat requests to manage errors.
Explanation
Packet radio is a form of digital communications mode that uses packets to send data between stations. In packet radio transmission, several key components are included to ensure the integrity and reliability of communications. Each transmission includes a check sum to permit error detection, a header containing the call sign of the destination station, and often automatic repeat-request (ARQ) features to handle errors. The check sum is a calculated value used to validate data integrity, ensuring that the data has not been corrupted during transmission. The header ensures that the data is directed to the correct recipient, much like addressing a letter. Automatic repeat requests improve reliability by requesting retransmissions of corrupted data packets. Therefore, all these elements are critical for effective packet radio communication, making answer 3, ‘All these choices are correct,’ the right choice.
T8D08 2022-2026