What does the SONET transmission standard define?

The SONET (Synchronous Optical Network) transmission standard specifically defines optical carrier data rates and interface standards for the transmission of digital information over fiber optic networks. This standard ensures seamless and efficient data transfer between various types of telecommunications equipment by providing a standardized method for the multiplexing and framing of data in synchronous transmission.

SONET is crucial for establishing high-capacity telecommunication links and allows for the integration of multiple types of services, such as voice, data, and video, into a single network infrastructure. By defining data rates such as OC-1, OC-3, OC-12, and so forth, SONET facilitates interoperability across different networks and ensures that equipment from various manufacturers can work together efficiently.

The other choices focus on distinct areas of technology unrelated to SONET. Wireless transmission speeds pertain to mobile communications and do not involve SONET. Data compression techniques for video content are specifically applicable to media and streaming services and are not addressed by SONET standards. Ethernet interface standards are concerned with local network connectivity and data exchange, distinct from the optical transmission capabilities defined by SONET. Thus, the focus on optical carrier data rates and interface standards makes the first choice the correct answer in the context of SONET.