Fiber optic cabling

Correct Answer: Bandwidth capacity

When it comes to future-proofing a fiber optic network, the most important aspect to consider is 'Bandwidth capacity'. The bandwidth of the cable determines the maximum data rate that the network can support. Over time, the client's needs for data rates may grow, so selecting a cable with a higher bandwidth capacity ensures that the network will be able to handle these future demands. The 'Cable length' though, is vital for the effective operation of the network, but it does not have a direct relation to future-proofing because signal strength and therefore data rate does not increase with cable length. As for the 'Cable color', it has no functional purpose and is only used for organizational purposes. Similarly, the 'Jacket material' primarily affects the physical durability and safety of the cable, rather than its data carrying capabilities or future proofing possibilities.

Correct Answer: Dirty connectors

The most likely cause of intermittent connectivity issues in new fiber connections is dirty connectors. Fiber connections are very sensitive and even a small amount of dirt on the connectors can lead to significant signal loss, causing intermittent disruptions in connectivity. It's important to always clean fiber connectors before installation or reconnection. As for the other options, cable splicing is a process to join two cables together, which is not a common cause for intermittent issues; mismatched connectors would cause a complete failure, not intermittent issues; and cable pinching could cause damage but is less likely to only result in intermittent issues.

Correct Answer: Single-mode fiber

Single-mode fiber would be the most suitable for this task. It provides a higher transmission rate and up to 50 times more distance than multi-mode fiber. The reason for this difference is the smaller diameter of the single-mode fiber, which reduces the chance for signal overlap and allows signals to travel faster and further. It's the best choice for long-distance data transmission, such as between two buildings that are 1 km apart. Multi-mode fiber, while also a type of fiber optic cable, is more suited for short distances, such as within a building. It faces high attenuation and dispersion over long distances. The other options - shielded twisted pair and unshielded twisted pair - are types of copper cables and do not offer the same performance as fiber optic cables, especially over long distances.