Which of the following is a characteristic of single-mode fiber?

A.
Single-mode fiber supports longer distances than multimode fiber.

B.
Single-mode fiber has increased bandwidth than multimode fiber.

C.
Single-mode supports only a ring topology.

D.
Single mode allows multiplexing of electrical and light signals.

Explanation:
Identifying and Working with Twisted-Pair Cable

With single-mode fiber, you send one signal. As a result, the single mode can communicate over multi-mode.