The hypothesis that high energy cosmic neutrinos are power law distributed is critically analyzed .
We propose a model with two-components that explains better the observations .
The extragalactic component of the high energy neutrino flux has a canonical E _ { \nu } ^ { -2 } spectrum while the galactic component has a E _ { \nu } ^ { -2.7 } spectrum ; both of them are significant .
This model has several implications , that can be tested by IceCube and ANTARES in the next years .
Moreover , the existence of a diffuse component , close to the Galactic plane and that yields ( 20-30 ) % of IceCube ’ s events , is interesting for the future \mbox { km } ^ { 3 } neutrino telescopes located in the Northern Hemisphere and for gamma ray telescopes aiming at measuring events till few 100 TeV from the Southern sky .