What are two common types of outside plant cabling installations?

In the realm of outside plant cabling installations, aerial and underground cabling are indeed the two predominant methods used. Aerial cabling involves running cables overhead, typically on utility poles, which is often seen in urban or suburban settings where overhead space is available. This method is generally easier and less costly to install compared to underground cabling, which requires digging and is often more expensive due to labor and material costs.

Underground cabling, on the other hand, involves burying cables beneath the ground, which offers protection from environmental factors and potential damage. This type of installation is essential in areas where aesthetics and exposure to weather conditions are concerns.

In contrast, the other options presented do not specifically refer to the most common types of outside plant cabling installations. For instance, while in-building cabling refers to the internal wiring of buildings, it does not pertain to outside plant installations. Similarly, surface mounted and buried cabling may describe specific installation techniques, but they lack the wide applicability and recognition of aerial and underground methods in the context of outside plant infrastructure.