How easy it might be to break a fiber optic cable depends on its protection level. And without a protective barrier, the risk of breaking is quite high. 1 mm, so the stretching in this case would be about 0. Another example of the flexibility of glass is fiberglass, which is used to make boats, paddles, surfboards, portable pools. In today's hyper-connected world, fiber optic cables serve as the lifelines of high-speed data transmission, powering everything from global telecom networks to local FTTH (Fiber to the Home) systems. While these cables are engineered for durability (with some rated to last 25+ years), they are not invulnerable. Even. Fiber optic internet is the best around for several big reasons. It's faster than coaxial internet, offers symmetrical upload and download speeds, and makes it easier than ever for households to enjoy smooth, steady surfing or streaming without worry.