In a passive optical network (PON), which category of fiber-optic cable is routed from the headend into the optical distribution network (ODN)?

In a passive optical network (PON), the correct choice is trunk cable. Trunk cables play a vital role in the architecture of a PON as it routes the optical signals from the headend, which is the central point of the network, into the optical distribution network (ODN). This type of fiber-optic cable is typically designed for long-distance transmission, providing the backbone for connectivity and ensuring that the optical signals can travel significant distances with minimal loss.

The trunk cable serves as the primary connection that distributes signals to various points within the network, which may then branch off into smaller distribution cables or drop cables, connecting to end-user locations. Understanding this hierarchical structure is essential for designing and implementing an efficient PON system, as it impacts the overall performance and quality of service delivered to users.