Final answer:
The CRC is not a datalink but an error-detecting code used in digital networks and storage systems to ensure the integrity of data transmissions.
Step-by-step explanation:
The CRC, or Cyclic Redundancy Check, is an error-detecting code used in digital networks and storage systems to ensure the integrity of data transmissions. It is not a data link itself, but rather a method for detecting and correcting errors in data transmission. Therefore, it does not have direct access to any datalinks. The CRC is applied to the data being transmitted, and the resulting CRC value is sent along with the data. At the receiving end, the CRC is recalculated and compared to the sent CRC value to detect any errors.