Modular Port Concentrators (MPCs) are a set of next-generation advanced line modules for Juniper Networks® MX Series 3D Universal Edge Routers that deliver the performance, services, and scalability that are critical to today's advanced Ethernet services edge and broadband edge networks. Designed for flexibility, MPCs introduce both the industry's highest capacity and modular 1GbE, 10GbE, 40GbE, and 100GbE, along with Multiservice MICs (Sonet/SDH and ATM) hardware to the MX Series portfolio, allowing customers to flexibly mix and match interfaces to create service-specific and "pay as you grow" configurations. The MPC houses the packet forwarding engines that deliver comprehensive Layer 3 routing (IPv4 and IPv6), MPLS, Layer 2 switching, inline services, and advanced hierarchical quality of service (H-QoS) per MX Series slot.