{"id":213,"date":"2021-02-25T10:13:48","date_gmt":"2021-02-25T09:13:48","guid":{"rendered":"http:\/\/blog.exkalibr.sk\/?p=213"},"modified":"2021-02-25T10:13:48","modified_gmt":"2021-02-25T09:13:48","slug":"ako-vybrat-kategoriu-sietovych-prvkov","status":"publish","type":"post","link":"https:\/\/blog.exkalibr.sk\/index.php\/2021\/02\/25\/ako-vybrat-kategoriu-sietovych-prvkov\/","title":{"rendered":"Ako vybra\u0165 kateg\u00f3riu sie\u0165ov\u00fdch prvkov?"},"content":{"rendered":"

<\/h2>\n

Z\u00e1kladn\u00e9 rozdelenie prvkov \u0161trukt\u00farovanej kabel\u00e1\u017ee<\/strong><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Ozna\u010denie kateg\u00f3rie<\/th>\nVznik a popis kateg\u00f3rie<\/th>\nMaxim\u00e1lna prenosov\u00e1 r\u00fdchlos\u0165<\/th>\n<\/tr>\n<\/thead>\n
Kateg\u00f3ria 3 (Cat. 3)<\/td>\nJe najni\u017e\u0161ia kateg\u00f3ria. U prv\u00fdch siet\u00ed sa komponenty kateg\u00f3rie 3 pou\u017e\u00edvaly na prenos hlasu i d\u00e1t. Dnes sa u\u017e prvky kateg\u00f3rie 3 vo v\u00e4\u010d\u0161ine pr\u00edpadov pou\u017e\u00edvaj\u00fa len pre telef\u00f3nne rozvody (napr. Prepojovacie ISDN panely, k\u00e1ble k telef\u00f3nnej \u00fastredni \u010di prepojovac\u00ed \u0161n\u00fary k telef\u00f3nnemu pr\u00edstroju). Maxim\u00e1lna prenosov\u00e1 r\u00fdchlos\u0165, ktor\u00e9 bolo mo\u017en\u00e9 dosahova\u0165 na kabel\u00e1\u017each kateg\u00f3rie 3, bola 10 Mb \/ s (protokol 10Base-T).<\/td>\n10 Mb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 4 (Cat. 4)<\/td>\nT\u00e1to kateg\u00f3ria sa u\u017e takmer nepou\u017e\u00edva. Bola sp\u00e1jan\u00e1 predov\u0161etk\u00fdm so spolo\u010dnos\u0165ou IBM a jej prvkami pre siete Token Ring. Kateg\u00f3ria 4 bola silne zast\u00fapen\u00e1 predov\u0161etk\u00fdm v USA, v eur\u00f3pskych \u0161tandardoch nebola nikdy spomenut\u00e1.<\/td>\n16 Mb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 5 (Cat. 5)<\/td>\nT\u00e1to kateg\u00f3ria bola schv\u00e1len\u00e1 v roku 1995. Teraz je u\u017e nahraden\u00e1 kateg\u00f3riou 5E – rovnako ako v pr\u00edpade kateg\u00f3rie 3 a 4, sa jedn\u00e1 u\u017e o historick\u00fa kateg\u00f3rii. Maxim\u00e1lna prenosov\u00e1 r\u00fdchlos\u0165, ktor\u00e9 bolo mo\u017en\u00e9 dosahova\u0165 na komponentoch kateg\u00f3rie 5 bola 100 Mb \/ s (tzv. Fast Ethernet, protokol 100Base-T).<\/td>\n100 Mb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 5E (Cat. 5E)<\/td>\nVych\u00e1dza z kateg\u00f3rie 5 a m\u00e1 aj rovnak\u00fa \u0161\u00edrku p\u00e1sma (tj. 100 MHz). Z d\u00f4vodu cenovej dostupnosti je v tejto chv\u00edli kateg\u00f3rie 5E st\u00e1le najroz\u0161\u00edrenej\u0161ia kateg\u00f3ri\u00ed v \u0161trukt\u00farovanej kabel\u00e1\u017ei. Komponenty kateg\u00f3rie 5E vie prenies\u0165 aj Gigabit Ethernet v podan\u00ed protokole 1000BaseT. Av\u0161ak prenosov\u00e1 r\u00fdchlos\u0165 1 Gb \/ s je limitnou r\u00fdchlos\u0165ou pre v\u0161etky komponenty kateg\u00f3rie 5E.<\/td>\n1 Gb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 6 (Cat. 6)<\/td>\nT\u00e1to kateg\u00f3ria bola schv\u00e1len\u00e1 v roku 2002. Pracuje s dvojn\u00e1sobnou \u0161\u00edrkou p\u00e1sma ako kateg\u00f3ria 5E (tj. A\u017e 250 MHz). Vy\u0161\u0161ia kvalita komponentov s v\u00e4\u010d\u0161ou \u0161\u00edrkou p\u00e1sma zais\u0165uje vynikaj\u00facu spo\u013eahlivos\u0165 prenosu Gigabit Ethernetu (1 Gb \/ s) u kabel\u00e1\u017enych syst\u00e9mov kateg\u00f3rie 6 v porovnan\u00ed s kateg\u00f3riou 5E a z\u00e1rove\u0148 aj podporu \u010fal\u0161\u00edch protokolov (napr. Okrem u\u017e spom\u00ednan\u00e9ho 1000Base-T i 1000Base-TX alebo \u010diasto\u010dne aj nov\u00e9ho protokolu 10GBase-T).<\/td>\n10 Gb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 6A (Cat. 6A)<\/td>\nJe najnov\u0161ie kateg\u00f3rie, ktor\u00e1 vznikla v r 2008. V tejto chv\u00edli je plne bli\u017e\u0161ie ur\u010den\u00e9 len v americkej norme ANSI \/ TIA \/ EIA 568B.2-10. S kateg\u00f3ri\u00ed 6A sa po\u010d\u00edta predov\u0161etk\u00fdm pre plnohodnotn\u00fd prenos protokolu 10GBase-T na v\u0161etky vzdialenosti (r\u00fdchlos\u0165 10 Gb \/ s), ktor\u00e9 s\u00fa v metalickej kabel\u00e1\u017ei be\u017en\u00e9. Oproti kateg\u00f3rii 6 pracuj\u00fa komponenty kateg\u00f3rie 6A s dvojn\u00e1sobnou \u0161\u00edrkou p\u00e1sma – tj. 500 MHz, ktor\u00e1 poskytuje komponentom tejto novej kateg\u00f3rie u\u017e zmienen\u00fa vy\u0161\u0161iu d\u00e1tov\u00fa priepustnos\u0165. Kompletn\u00e9 schv\u00e1lenie t\u00fdchto nov\u00fdch prvkov i v ostatn\u00fdch \u0161tandardoch (tj. ISO \/ IEC a CENELEC) sa o\u010dak\u00e1va v druhej polovici roka 2009. Aj ke\u010f sa spo\u010diatku po\u010d\u00edtalo s nasaden\u00edm kateg\u00f3rie 6A predov\u0161etk\u00fdm v chrbticov\u00fdch spojoch alebo d\u00e1tov\u00fdch centr\u00e1ch, mnoh\u00ed v\u00fdrobcovia (napr. Solarix, Signamax \u010di RiT) pon\u00faka svoje 10G rie\u0161enie aj pre kabel\u00e1\u017ee be\u017en\u00fdch LAN siet\u00ed – tj. a\u017e k u\u017e\u00edvate\u013eovi na st\u00f4l.<\/td>\n10 Gb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 7 (Cat. 7)<\/td>\nT\u00e1to kateg\u00f3ria vznikla r. 1997, schv\u00e1lenie sa do\u010dkala v roku 2002, a to navy\u0161e iba pre k\u00e1bel a nie pre spojovacie hardware (tj. Z\u00e1suvky, patch panely at\u010f.). Pracovn\u00e1 frekvencia kateg\u00f3rie 7 je teraz 600 MHz.<\/td>\n10 Gb\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 7A (Cat. 7A)<\/td>\nVznikne potom, \u010do bude plne schv\u00e1len\u00e1 kateg\u00f3rie 6A aj v eur\u00f3pskej a celosvetovej norme. S\u00fa\u010dasn\u00e1 kateg\u00f3ria 7 toti\u017e bude z d\u00f4vodu ve\u013ekej „bl\u00edzkosti“ \u0161\u00edrky p\u00e1sma s kateg\u00f3riou 6A (500 MHz verzus 600 MHz) zmenen\u00e1 na kateg\u00f3riu s dvojn\u00e1sobnou \u0161\u00edrkou p\u00e1sma 1000 MHz a s ozna\u010den\u00edm 7A.<\/td>\n10 GB\/s<\/td>\n<\/tr>\n
Kateg\u00f3ria 8 (Cat. 8)<\/td>\nNovo vznikaj\u00face kateg\u00f3rie pre vysokor\u00fdchlostn\u00e9 protokol 40Gbase-T so \u0161\u00edrkou p\u00e1sma 2000 Mhz.<\/td>\n40 GB\/s<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u00ed\u0165ov\u00e9 kabely si m\u016f\u017eete vybrat ZDE<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Z\u00e1kladn\u00e9 rozdelenie prvkov \u0161trukt\u00farovanej kabel\u00e1\u017ee Ozna\u010denie kateg\u00f3rie Vznik a popis kateg\u00f3rie Maxim\u00e1lna prenosov\u00e1 r\u00fdchlos\u0165 Kateg\u00f3ria 3 (Cat. 3) Je najni\u017e\u0161ia kateg\u00f3ria. U prv\u00fdch siet\u00ed sa komponenty kateg\u00f3rie 3 pou\u017e\u00edvaly na…<\/p>\n","protected":false},"author":2,"featured_media":214,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,54],"class_list":["post-213","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-kable","tag-sietove-prvky","entry"],"_links":{"self":[{"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/posts\/213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/comments?post=213"}],"version-history":[{"count":1,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/posts\/213\/revisions"}],"predecessor-version":[{"id":215,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/posts\/213\/revisions\/215"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/media\/214"}],"wp:attachment":[{"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/media?parent=213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/categories?post=213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.exkalibr.sk\/index.php\/wp-json\/wp\/v2\/tags?post=213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}