With an IP camera there are no problems associated with interlacing. Using progressive scan, the entire image is captured in each frame, with superior image quality as a result.
All cameras capture an image one line at a time. IP cameras use progressive scan in which the entire image is scanned on every pass.
Most analog cameras use interlaced scanning. This means that only lines with odd numbers are scanned on the first pass, and the even numbered lines are scanned on the next. The two subsets are then combined into one image. The problem with this is that any motion happening in between the passes will be blurred in the final image.