Systems and methods for distinguishing a node failure from a link failure are provided. The sole structure may comprise two layers of woven composite material. The remote vehicle senses a reflection of the laser beam and moves toward the designated destination. The icon has one or more attributes that provide direct visual information to the user if the data density is less than a predetermined value, but only indicates an existence of the catalyst and a time frame of the catalyst if the data density is greater than the predetermined value. By providing for persistent connections with clients, the connection manager allows for servers to communicate with clients, which would otherwise be inaccessible.