QSFP also known as Quad Small Form Factor Pluggable. All the specifications has been verified by vendors. The vendors have released all the modules, connectors and cages. It supoorts upto 40 Gb/s/port. Every port has the capability of supporting four independent channels. The speed can range upto 10 Gb/s/channel. In near future optical modules are going to support the kind of speed we are expecting. Today, QSFP connectors and cages are combined together so it can run at 10GB/s both in short-reach applications and backplane. In the late 2007, 8 and 10 Gb/s modules were introduced along with QSFP optical modules running 5Gb/s.