Certified Technology Specialist (CTS) Practice Exam

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What is the name of the cable commonly used for professional video transmission?

HDMI
SDI
VGA
DisplayPort

The correct answer is: SDI

The cable commonly used for professional video transmission is known as SDI, which stands for Serial Digital Interface. SDI is specifically designed for transmitting uncompressed digital video signals in broadcast and professional video environments. Its robust nature enables it to carry high-definition video over long distances without significant signal degradation, making it ideal for television studios, live event productions, and similar applications where quality and reliability are paramount. In contrast, while HDMI is widely used in consumer electronics for high-definition video and audio, it is not as commonly utilized in professional settings where the durability and transmission range of SDI become critical factors. VGA primarily serves as a standard for analog video signals, which is less prevalent in modern high-definition applications. DisplayPort offers higher bandwidth and is often used in computing and display scenarios, but it lacks the specific adaptations for long-distance transmission and networking that SDI provides in professional video contexts.