In VDV networks, what is commonly used for video transmission?

In VDV (Voice, Data, and Video) networks, video transmission can utilize several types of cabling, each serving different scenarios and requirements. Coaxial cables are often used for traditional video applications, such as cable television and CCTV systems, due to their ability to handle high frequencies and reduce signal loss over distances. Twisted pair cables, especially those adhering to standards like Category 5e or Category 6, can also transmit video signals, particularly in IP-based video systems where digital data is being sent over the network. Fiber optic cables, known for their high bandwidth and long-distance capabilities without degradation, are becoming increasingly popular for video transmission, especially in environments requiring high-definition footage or in long-range applications.

The inclusion of "All of these" as the correct option acknowledges that all these cabling types are valid for video transmission in different contexts within VDV networks. Each type of cable has its own advantages and is selected based on factors such as the required bandwidth, distance, cost, and the specific application within the network. This versatility reinforces the understanding that various technologies can coexist and be effectively utilized in integrated systems.