<https://secure.gravatar.com/avatar/3d95bee87df8c43a1e18bf215bdf5090?s=96&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sugengriyanto.com/what-is-multimode-fiber-optic-you-should-know/>