What components are used to ensure data integrity in telemetry packets?

What components are used to ensure data integrity in telemetry packets?

• A. Packets have only a payload and no headers or trailers.
• B. Headers, payload, trailer; CRC/FEC, sequence numbers; retransmission or error correction to ensure integrity.
• C. Integrity is ensured by encryption alone.
• D. Integrity relies on hardware redundancy only.

Answer: (B)

Data integrity in telemetry packets is maintained by a complete packet structure (header, payload, trailer) that carries both the data and the metadata needed for integrity checks. The trailer typically includes error-detection or error-correction codes such as CRC or FEC, which let the receiver determine if the payload has been corrupted. Sequence numbers help the receiver detect missing or out-of-order packets, so gaps and reassembly can be managed correctly. When errors are detected, a mechanism like retransmission or in-packet error correction provides a way to recover the original data. This combination of framing, error detection/correction, and a recovery method is what keeps telemetry data reliable across imperfect channels. Without headers and trailers, there’s no place to attach integrity information; encryption alone doesn’t guarantee integrity since it focuses on confidentiality (and may still require separate integrity checks), and relying only on hardware redundancy overlooks the need to detect and fix data errors that occur during transmission.

Data integrity in telemetry packets is maintained by a complete packet structure (header, payload, trailer) that carries both the data and the metadata needed for integrity checks. The trailer typically includes error-detection or error-correction codes such as CRC or FEC, which let the receiver determine if the payload has been corrupted. Sequence numbers help the receiver detect missing or out-of-order packets, so gaps and reassembly can be managed correctly. When errors are detected, a mechanism like retransmission or in-packet error correction provides a way to recover the original data. This combination of framing, error detection/correction, and a recovery method is what keeps telemetry data reliable across imperfect channels. Without headers and trailers, there’s no place to attach integrity information; encryption alone doesn’t guarantee integrity since it focuses on confidentiality (and may still require separate integrity checks), and relying only on hardware redundancy overlooks the need to detect and fix data errors that occur during transmission.