What is the function of encryption in data transmission?

Encryption is a method used to secure data transmitted over networks by converting it into a format that is unreadable to unauthorized users. The primary function of encryption in data transmission is to protect sensitive information, ensuring that only those who possess the correct decryption key can access and comprehend the data. This is crucial in maintaining confidentiality and integrity, especially in scenarios where sensitive information, such as personal identification details or financial data, is being transmitted.

While other options relate to data handling and management, they do not directly pertain to the core function of encryption. Speeding up data transfer, storing data in multiple locations, and managing data storage revolve around functionality and efficiency rather than security. Hence, the emphasis on encryption as a protective measure solidifies its role in preventing unauthorized access to transmitted data.