According to structured cabling standards, the maximum length of multimode fiber optic cable for backbones is?

The standard maximum length for multimode fiber optic cable in backbone applications is specified as 2000 meters. This limit is set to ensure that the signal can travel the entire length of the cable without significant degradation or loss of quality. Backbone cabling typically connects different networks or areas in a structured cabling system, and maintaining signal integrity is crucial for efficient data transmission.

Selecting a length of 2000 meters allows for sufficient distance within commercial buildings and campus environments while ensuring compliance with performance specifications outlined in structured cabling standards such as ANSI/TIA-568. These standards are established to support various network applications and ensure consistency and reliability across installations. Using lengths longer than the specified maximum could lead to increased signal attenuation and potential communication issues, which is why it's important to adhere to these standards when designing and implementing cabling systems.