to manage low-work. With RPR, MPLS and other new technology, shape, and the associated development of new technologies. MSTP in the metropolitan area will e increasingly important in the building. MAN's biggest feature is the diversity of each technology has its own application space, we can not be simply a way to determine the various regions of metropolitan development should be based on city size, type of business, users select a reasonable distribution technology, and fully consider how to balance better use of work resources and the future evolution of the relationship between the operator to create the greatest return on investment. I believe that with the gradual improvement of technology and standards and development, MSTP technology and equipment will usher in a brighter tomorrow.