What does the International Organization for Standardization (ISO) define?

The International Organization for Standardization (ISO) is primarily focused on establishing international standards that ensure quality, safety, and efficiency across various industries. Specifically, ISO develops standards for a wide range of sectors, which includes international cabling and other related standards essential for telecommunications and networking infrastructures. These standards promote interoperability and consistency, allowing manufacturers and service providers to operate effectively across different markets and regions.

The content and focus of ISO standards cover more than just cabling; they encompass various processes and systems to enhance performance and safety on a global scale. Therefore, the answer correctly identifies the ISO's role in defining international cabling and other standards, which is integral for the telecommunications industry and its stakeholders.