{"id":4273,"date":"2024-01-11T13:56:47","date_gmt":"2024-01-11T13:56:47","guid":{"rendered":"https:\/\/tech-lib.eu\/tech\/?p=4273"},"modified":"2024-01-11T13:56:47","modified_gmt":"2024-01-11T13:56:47","slug":"celkovy-pocet-dostupnych-kanalu-pro-bezdratove-site-802-11g","status":"publish","type":"post","link":"https:\/\/tech-lib.eu\/tech\/celkovy-pocet-dostupnych-kanalu-pro-bezdratove-site-802-11g\/","title":{"rendered":"Celkov\u00fd po\u010det dostupn\u00fdch kan\u00e1l\u016f pro bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g"},"content":{"rendered":"
\n
Jak\u00fd je aktu\u00e1ln\u011b pou\u017e\u00edvan\u00fd standard WiFi?<\/div>\n
Aktu\u00e1ln\u011b nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edm je standard 802.11n \u2013 WiFi 4. Cached<\/div>\n
\n\t\t\t\t\t Dal\u0161\u00ed informace najdete na<\/span> www.alza.cz<\/a>\n\t\t\t\t<\/div>\n<\/p><\/div>\n
P\u0159edstavte se: D\u00edky snadn\u00e9mu pou\u017e\u00edv\u00e1n\u00ed bezdr\u00e1tov\u00fdch s\u00edt\u00ed pro p\u0159ipojen\u00ed za\u0159\u00edzen\u00ed a p\u0159\u00edstup k internetu se bezdr\u00e1tov\u00e9 s\u00edt\u011b staly nezbytnou sou\u010d\u00e1st\u00ed na\u0161eho ka\u017edodenn\u00edho \u017eivota. Technologie 802.11g, \u0161iroce roz\u0161\u00ed\u0159en\u00e1 technologie bezdr\u00e1tov\u00fdch s\u00edt\u00ed, poskytuje spolehliv\u00e9 a rychl\u00e9 p\u0159ipojen\u00ed. P\u0159i ur\u010dov\u00e1n\u00ed mno\u017estv\u00ed dostupn\u00fdch komunika\u010dn\u00edch kan\u00e1l\u016f je v\u0161ak t\u0159eba vz\u00edt v \u00favahu n\u011bkolik v\u011bc\u00ed. V tomto \u010dl\u00e1nku se budeme zab\u00fdvat celkov\u00fdm po\u010dtem kan\u00e1l\u016f, kter\u00e9 jsou dostupn\u00e9 pro bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g, a informacemi o souvisej\u00edc\u00edch ot\u00e1zk\u00e1ch, jako je celkov\u00fd po\u010det kan\u00e1l\u016f pro 802.11a, rozsah 802.11g a co znamen\u00e1 „pouze 802.11g“. <\/p>\n
<\/div>\n

Celkov\u00fd po\u010det kan\u00e1l\u016f pro bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g je: <\/p>\n

<\/div>\n

Bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g funguj\u00ed ve frekven\u010dn\u00edm rozsahu 2,4 GHz. V tomto frekven\u010dn\u00edm p\u00e1smu je pro komunikaci otev\u0159eno celkem 14 kan\u00e1l\u016f. Je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee ne v\u0161echny tyto kan\u00e1ly lze pou\u017e\u00edvat najednou, ani\u017e by se vz\u00e1jemn\u011b ru\u0161ily. Bezdr\u00e1tov\u00e9 telefony, mikrovlnn\u00e9 trouby a za\u0159\u00edzen\u00ed Bluetooth vyu\u017e\u00edvaj\u00ed frekven\u010dn\u00ed p\u00e1smo 2,4 GHz, co\u017e m\u016f\u017ee v\u00e9st k p\u0159et\u00ed\u017een\u00ed a zhor\u0161en\u00ed kvality bezdr\u00e1tov\u00e9ho sign\u00e1lu. <\/p>\n

<\/div>\n

Pouze t\u0159i ze 14 p\u0159\u00edstupn\u00fdch kan\u00e1l\u016f frekven\u010dn\u00edho p\u00e1sma 2,4 GHz, kan\u00e1ly 1, 6 a 11, lze pou\u017e\u00edvat, ani\u017e by se ru\u0161ila jin\u00e1 za\u0159\u00edzen\u00ed. Term\u00edn „prim\u00e1rn\u00ed kan\u00e1ly“ se vztahuje na tyto kan\u00e1ly. Spr\u00e1vci s\u00edt\u00ed mohou \u00fasp\u011b\u0161n\u011b omezit ru\u0161en\u00ed a zv\u00fd\u0161it celkov\u00fd v\u00fdkon bezdr\u00e1tov\u00e9 s\u00edt\u011b vyu\u017eit\u00edm t\u011bchto kl\u00ed\u010dov\u00fdch kan\u00e1l\u016f. Abyste zabr\u00e1nili ru\u0161en\u00ed od jin\u00fdch bezdr\u00e1tov\u00fdch s\u00edt\u00ed a za\u0159\u00edzen\u00ed, je nezbytn\u00e9 zvolit spr\u00e1vn\u00fd kan\u00e1l pro va\u0161i bezdr\u00e1tovou s\u00ed\u0165. Celkov\u00fd po\u010det kan\u00e1l\u016f, kter\u00e9 mohou bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11a vyu\u017e\u00edvat, je: Bezdr\u00e1tov\u00fd standard 802.11a na rozd\u00edl od standardu 802.11g pracuje ve frekven\u010dn\u00edm p\u00e1smu 5 GHz. Ve srovn\u00e1n\u00ed s p\u00e1smem 2,4 GHz nab\u00edz\u00ed tento frekven\u010dn\u00ed rozsah v\u00edce kan\u00e1l\u016f, kter\u00e9 je mo\u017en\u00e9 pou\u017e\u00edvat. Ve frekven\u010dn\u00edm spektru 5 GHz je k dispozici celkem 23 nep\u0159ekr\u00fdvaj\u00edc\u00edch se kan\u00e1l\u016f, tak\u017ee v\u00fdb\u011br kan\u00e1lu je flexibiln\u011bj\u0161\u00ed a ru\u0161en\u00ed je m\u00e9n\u011b pravd\u011bpodobn\u00e9. Bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11a mohou d\u00edky \u0161ir\u0161\u00edmu v\u00fdb\u011bru kan\u00e1l\u016f umo\u017enit v\u00edce soub\u011b\u017en\u00fdch p\u0159ipojen\u00ed a vy\u0161\u0161\u00ed rychlost p\u0159enosu dat. Mezi kan\u00e1ly 802.11g pro komunikaci klient\u016f pat\u0159\u00ed: Hlavn\u00ed kan\u00e1ly (1, 6 a 11) v bezdr\u00e1tov\u00fdch s\u00edt\u00edch 802.11g jsou prim\u00e1rn\u011b vyu\u017e\u00edv\u00e1ny pro komunikaci mezi p\u0159\u00edstupov\u00fdm bodem (AP) a klienty. Tyto mo\u017enosti jsou pova\u017eov\u00e1ny za nejlep\u0161\u00ed pro vytv\u00e1\u0159en\u00ed spolehliv\u00fdch spojen\u00ed a omezen\u00ed ru\u0161en\u00ed. Klienti p\u0159ipojuj\u00edc\u00ed se k bezdr\u00e1tov\u00e9 s\u00edti 802.11g si mohou pro p\u0159ipojen\u00ed k p\u0159\u00edstupov\u00e9mu bodu zvolit kter\u00fdkoli z hlavn\u00edch kan\u00e1l\u016f, kter\u00e9 jsou jim k dispozici. Oblast pokryt\u00ed bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g: Dosah bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g se m\u016f\u017ee li\u0161it v z\u00e1vislosti na \u0159ad\u011b prom\u011bnn\u00fdch, v\u010detn\u011b vys\u00edlac\u00ed s\u00edly p\u0159\u00edstupov\u00e9ho bodu, okoln\u00edho prost\u0159ed\u00ed a p\u0159ek\u00e1\u017eek. Bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g maj\u00ed obvykle vnit\u0159n\u00ed dosah 100-150 stop a venkovn\u00ed dosah a\u017e 300 stop. Je d\u016fle\u017eit\u00e9 m\u00edt na pam\u011bti, \u017ee tyto dosahy jsou pouze odhady a \u017ee s\u00edla sign\u00e1lu, ru\u0161en\u00ed a p\u0159ek\u00e1\u017eky, jako jsou zdi, mohou m\u00edt vliv na skute\u010dn\u00fd dosah. <\/p>\n

<\/div>\n

Pouze 802.11g: <\/p>\n

<\/div>\n

Konfigurace bezdr\u00e1tov\u00e9 s\u00edt\u011b ozna\u010dovan\u00e1 jako „pouze 802.11g“ zahrnuje p\u0159\u00edstupov\u00fd bod nebo sm\u011brova\u010d, kter\u00fd je nakonfigurov\u00e1n pouze na bezdr\u00e1tov\u00fd standard 802.11g. Aby bylo mo\u017en\u00e9 se k s\u00edti p\u0159ipojit, mus\u00ed za\u0159\u00edzen\u00ed tak\u0159\u00edkaj\u00edc podporovat tak\u00e9 standard 802.11g. Omezen\u00edm s\u00edt\u011b pouze na standard 802.11g lze zajistit interoperabilitu, zlep\u0161it v\u00fdkon a sn\u00ed\u017eit ru\u0161en\u00ed od za\u0159\u00edzen\u00ed, kter\u00e1 pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 bezdr\u00e1tov\u00e9 standardy. <\/p>\n

<\/div>\n

Shrnut\u00ed: <\/p>\n

<\/div>\n

Bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g nab\u00edzej\u00ed ve frekven\u010dn\u00edm p\u00e1smu 2,4 GHz celkem 14 kan\u00e1l\u016f. Pouze t\u0159i z t\u011bchto nep\u0159ekr\u00fdvaj\u00edc\u00edch se kan\u00e1l\u016f – kan\u00e1ly 1, 6 a 11 – lze pou\u017e\u00edvat sou\u010dasn\u011b, ani\u017e by se ru\u0161ily. Bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11a sice pracuj\u00ed ve frekven\u010dn\u00edm spektru 5 GHz a poskytuj\u00ed v\u011bt\u0161\u00ed po\u010det p\u0159\u00edstupn\u00fdch kan\u00e1l\u016f, ale nen\u00ed mo\u017en\u00e9 vytvo\u0159it v\u00edce soub\u011b\u017en\u00fdch p\u0159ipojen\u00ed a dos\u00e1hnout vy\u0161\u0161\u00ed rychlosti p\u0159enosu dat. P\u0159i nastavov\u00e1n\u00ed bezdr\u00e1tov\u00fdch s\u00edt\u00ed je nezbytn\u00e9 br\u00e1t v \u00favahu dostupn\u00e9 kan\u00e1ly, zvolit spr\u00e1vn\u00e9 kan\u00e1ly, aby se omezilo ru\u0161en\u00ed, a maximalizovat v\u00fdkon s\u00edt\u011b.<\/p><\/div>\n

\n
FAQ<\/div>\n
\n
Jak\u00e1 je \u0161\u00ed\u0159ka kan\u00e1lu 802.11 g?<\/div>\n

Bezdr\u00e1tov\u00e9 s\u00edt\u011b 802.11g maj\u00ed \u0161\u00ed\u0159ku kan\u00e1lu 20 MHz. <\/p>\n<\/div>\n

\n
Co je to protokol 802.11g?<\/div>\n

Standard bezdr\u00e1tov\u00fdch s\u00edt\u00ed, kter\u00fd vyu\u017e\u00edv\u00e1 frekven\u010dn\u00ed spektrum 2,4 GHz, je zn\u00e1m\u00fd jako protokol 802.11g. Je j\u00edm roz\u0161\u00ed\u0159en standard 802.11b, kter\u00fd poskytuje vy\u0161\u0161\u00ed rychlost p\u0159enosu dat a\u017e 54 Mb\/s. Tento protokol, kter\u00fd umo\u017e\u0148uje zp\u011btnou kompatibilitu se za\u0159\u00edzen\u00edmi 802.11b, se \u010dasto pou\u017e\u00edv\u00e1 pro s\u00edt\u011b WLAN. <\/p>\n<\/div>\n

\n
Kolik kan\u00e1l\u016f obsahuje standard 802.11 b?<\/div>\n

Ve standardu 802.11b je k dispozici celkem 14 kan\u00e1l\u016f.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Jak\u00fd je aktu\u00e1ln\u011b pou\u017e\u00edvan\u00fd standard WiFi? Aktu\u00e1ln\u011b nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edm je standard 802.11n \u2013 WiFi 4. Cached Dal\u0161\u00ed informace najdete na www.alza.cz P\u0159edstavte se: D\u00edky snadn\u00e9mu pou\u017e\u00edv\u00e1n\u00ed bezdr\u00e1tov\u00fdch s\u00edt\u00ed pro p\u0159ipojen\u00ed za\u0159\u00edzen\u00ed a p\u0159\u00edstup k internetu se bezdr\u00e1tov\u00e9 s\u00edt\u011b staly nezbytnou sou\u010d\u00e1st\u00ed na\u0161eho ka\u017edodenn\u00edho \u017eivota. Technologie 802.11g, \u0161iroce roz\u0161\u00ed\u0159en\u00e1 technologie bezdr\u00e1tov\u00fdch s\u00edt\u00ed, poskytuje spolehliv\u00e9 a rychl\u00e9 p\u0159ipojen\u00ed. … \u010c\u00edst d\u00e1l<\/a><\/p>\n","protected":false},"author":45,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1778],"tags":[],"class_list":["post-4273","post","type-post","status-publish","format-standard","hentry","category-kanaly-bezdratove-site"],"_links":{"self":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts\/4273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/users\/45"}],"replies":[{"embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/comments?post=4273"}],"version-history":[{"count":1,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts\/4273\/revisions"}],"predecessor-version":[{"id":14791,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts\/4273\/revisions\/14791"}],"wp:attachment":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/media?parent=4273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/categories?post=4273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/tags?post=4273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}