{"id":403,"date":"2020-04-06T08:57:45","date_gmt":"2020-04-06T06:57:45","guid":{"rendered":"http:\/\/tech.sosthe.sk\/?p=403"},"modified":"2020-04-06T16:35:54","modified_gmt":"2020-04-06T14:35:54","slug":"6-1-uloha-fyzickej-vrstvy","status":"publish","type":"post","link":"http:\/\/tech.sosthe.sk\/index.php\/2020\/04\/06\/6-1-uloha-fyzickej-vrstvy\/","title":{"rendered":"6.1.\u2002\u00daloha fyzickej vrstvy"},"content":{"rendered":"<p>Fyzick\u00e1 vrstva referen\u010dn\u00e9ho modelu ISO\/OSI poskytuje pre vy\u0161\u0161ie vrstvy prenos bin\u00e1rnej inform\u00e1cie (postupnosti jednotiek a n\u00fal) medzi vysiela\u010dom a prij\u00edma\u010dom. \u0160pecifikuje vlastnosti pou\u017eit\u00e9ho fyzick\u00e9ho m\u00e9dia (napr. tvar pou\u017eit\u00e9ho dr\u00f4tu, pou\u017e\u00edvan\u00e9 frekven\u010dn\u00e9 p\u00e1smo) a tie\u017e aj vlastnosti vysiela\u010da a prij\u00edma\u010da pren\u00e1\u0161anej bin\u00e1rnej inform\u00e1cie. Ve\u013emi d\u00f4le\u017eit\u00fd je tie\u017e popis sp\u00f4sobu k\u00f3dovania tejto bin\u00e1rnej inform\u00e1cie do sign\u00e1lu, ktor\u00fd sa d\u00e1 prenies\u0165 dan\u00fdm fyzick\u00fdm m\u00e9diom. Medzi vysiela\u010dom a prij\u00edma\u010dom je takto vybudovan\u00fd komunika\u010dn\u00fd kan\u00e1l, ktor\u00fd pren\u00e1\u0161a tieto sign\u00e1ly. Sign\u00e1ly predstavuj\u00fa nejak\u00e9 zmeny parametrov (stavov) komunika\u010dn\u00e9ho kan\u00e1la, napr\u00edklad elektrick\u00e9 nap\u00e4tie, elektrick\u00fd pr\u00fad, frekvencia, svetlo\/tma a podobne. Vysiela\u010d tieto parametre men\u00ed a prij\u00edma\u010d je schopn\u00fd ich odhali\u0165 a rozl\u00ed\u0161i\u0165. Je nutn\u00e9, aby sme pou\u017eili aspo\u0148 dva druhy sign\u00e1lov, aby sme vedeli zak\u00f3dova\u0165 bin\u00e1rnu inform\u00e1ciu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fyzick\u00e1 vrstva referen\u010dn\u00e9ho modelu ISO\/OSI poskytuje pre vy\u0161\u0161ie vrstvy prenos bin\u00e1rnej inform\u00e1cie (postupnosti jednotiek a n\u00fal) medzi vysiela\u010dom a prij\u00edma\u010dom. \u0160pecifikuje vlastnosti pou\u017eit\u00e9ho fyzick\u00e9ho m\u00e9dia&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"_links":{"self":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/posts\/403"}],"collection":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/comments?post=403"}],"version-history":[{"count":1,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/posts\/403\/revisions"}],"predecessor-version":[{"id":404,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/posts\/403\/revisions\/404"}],"wp:attachment":[{"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/media?parent=403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/categories?post=403"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/tech.sosthe.sk\/index.php\/wp-json\/wp\/v2\/tags?post=403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}