The ever increasing demand for bandwidth has triggered development of numerous wide-area-networking (WAN) solutions. For data center providers, the result is a broad choice of data center connectivity solutions, including Ethernet Line (E-Line), Ethernet LAN (E-LAN) and Virtual Private LAN Service (VPLS). Up to 100GbE is readily available with some of these services, and some carriers are planning to make 400GbE more available soon.
