Video conference bridges accomplish their conferencing functionality by doing media transcoding or media switching. What are the three main advantages of media switching? (Choose three.)

Because media switching forwards compressed video bitstreams directly without decode/re-encode cycles, end-to-end delay is minimal - typically just network propagation and switching fabric delay.

Custom layout composition (e.g., continuous presence) requires the bridge to decode and re-composite streams, which is a transcoding function, not available in a pure switching architecture.

Upscaling low-resolution video to a higher resolution requires decoding the original stream and re-encoding at a new resolution, which is a transcoding operation.

Without per-stream transcoding, each port consumes far less CPU and memory, so the hardware cost per supported port is significantly lower than a transcoding MCU.

The reduced processing overhead per stream allows a switching bridge to support many more simultaneous ports on equivalent hardware compared to a transcoding bridge.

Connecting endpoints at different bandwidths and resolutions in the same conference requires the bridge to transcode streams to a common format; a switching bridge forwards only a single stream resolution.