For jumpers, an important performance is the performance problem when bending. Since UTP twisted pairs are generally solid cores, they are poor in manageable performance.
First, the cable is relatively hard, which is not conducive to bending. Second, the solid core cable will have obvious return loss when it is bent, which will cause the performance of the cable to decline. Therefore, the solid core cable generally has a bending radius of clear requirements. For flexible cables with multi-strand cores specially used to manage jumpers, these problems are not present.
