What are the major differences between commercial sniffers and free sniffers?

What will be an ideal response?

The two major differences between commercial and free sniffers are:* Commercial sniffers generally cost money, but typically come with support.* Support on free sniffers has the reputation of being scant, meaning it is difficult to find anyone who will offer support; incomplete, meaning that the information was never recorded; or fiendishly expensive, compared to support for commercial products. This reputation is not always deserved.