What is a surface with a rope or chain going around it?

A surface with a rope or chain going around it can be described as being enclosed or bordered by that rope or chain. This configuration often serves to delineate a space, create a barrier, or provide a visual or physical boundary. Common examples include a fenced area in a park or a cordon around a restricted zone, indicating that entry is limited or controlled. The rope or chain effectively marks the perimeter of the designated area.