How is a sock leg marking characterized?

A sock leg marking is indeed characterized by a white marking that extends from the coronet band down the leg, typically going halfway up the cannon bone. This type of marking can be visually identifiable and is commonly seen in various horse breeds. The distinctive feature of a sock is that it does not extend all the way up to the knee or hock, which differentiates it from other leg markings like stockings or splashes that may cover more of the leg or be located higher up. Understanding these specific characteristics aids in properly identifying and describing horses, which is a valuable skill in equine practices.