http://www.ieee802.org/1/files/public/docs2010/liaison-nfinn-split-horizon-vid-filtering-0710-v04.pdf describes in pages 19 and 20 the
https://www.powershow.com/view3/4fd21c-NTEwO/http_www_ieee802_org_1_files_public_docs2010_liaison-nfinn-split-horizon-vid-filtering-0710-v04_pdf_describes_in_pages_19_and_20_the_powerpoint_ppt_presentation
Icons create by Freepik from www.flaticon.com/