Ezokuxhumana ezingenantambo, igama elithi "Hz" (elisho "i-hertz," ngemva kwesazi sesayensi yekhulu le-19 uHeinrich Hertz) libhekisela emvamisa wokudluliselwa kwemisakazo yomsakazo emijikelezweni ngomzuzwana:
- I-1Hz ilingana nomjikelezo owodwa ngomzuzwana.
- I-1MHz (megahertz) ilinganisa imijikelezo eyizigidi ezingu-1 ngomzuzwana (noma i-1 million Hz).
- I-1GHz (gigahertz) ilinganisa imijikelezo eyizigidi eziyi-1 ngomzuzwana (noma i-1000 MHz).
Amanethiwekhi ekhompyutha angenazintambo asebenza kuma frequency okudlulisa ahlukene, kuye ngokuthi ubuchwepheshe abasebenzisa. Amanethiwekhi angenantambo nawo asebenza ngaphezu kwamazinga amaningi (okubizwa ngokuthi ama-bands ) kunenani elilodwa lezinombolo.
Inethiwekhi esebenzisa ukukhulumisana kwe-radio okungenama-wireless ephezulu akuhlinzeki ngesivinini esheshayo kunama-wireless amanethiwekhi angenalutho.
Hz ku-Wi-Fi Networking
Amanethiwekhi we-Wi-Fi asebenza ku-2.4GHz noma ama-5GHz amaqembu. Lezi zigaba zemvamisa yomsakazo evulelwe ukuxhumana komphakathi (okungukuthi, okungavunyelwe umthetho) emazweni amaningi.
Ama-2.4GHz ama-Wi-Fi amabanga avela ku-2.412GHz ekupheleni okuphansi kuya ku-2.472GHz ekupheleni okuphezulu (neqembu elilodwa elengeziwe elinokusekelwa okukhawulelwe eJapane). Kusukela ngo- 802.11b kuze kufike ku- 802.11ac yakamuva, amanethiwekhi angama-2.4GHz we-Wi-Fi wonke ahlanganyele lawa ma-band bands futhi ahambisana nomunye nomunye.
I-Wi-Fi yaqala ukusebenzisa imisakazo engu-5GHz iqala ngo- 802.11a , nakuba ukusetshenziswa kwabo okujwayelekile emakhaya kwaqala kuphela ngo- 802.11n . Amaqembu we-5GHz Wi-Fi avela ku-5.170 kuya ku-5.825GHz, namanye amaqembu aphansi angeziwe aseJapane kuphela.
Ezinye izinhlobo zokubonisa okungenazintambo zilinganiselwe ku-Hz
Ngaphandle kwe-Wi-Fi, cabangela lezi ezinye izibonelo zokuxhumana okungenantambo:
- Amafoni angasetshenziswa ngamakhodi angasetshenziswa ku-900MHz ububanzi, njengoba kwenza izinga elisha le-802.11ah
- Ukuxhumeka kwenethiwekhi ye- Bluetooth isebenzisa ukusayina kwe-2.4GHz, okufana ne-Wi-FI, kodwa i-Bluetooth ne-Wi-Fi ayihambisani.
- Izindlela zokuxhumana eziningana ezingenantambo ezingama-60GHz zenzelwe izinhlelo zokusebenza ezikhethekile ezibandakanya inani elikhulu kakhulu lwedatha elihamba ngezindawo ezimfushane kakhulu.
Kungani ukuhlukahluka okuningi kangaka? Ngolunye, izinhlobo ezahlukene zokuxhumana kufanele zisebenzise ama-frequencies ahlukene ukuze ugweme ukugoqa komunye nomunye. Ngaphezu kwalokho, amasignali aphezulu-aphindaphindiwe afana ne-5GHz angathwala idatha enkulu kakhulu (kodwa, ngokubuyisela, abe nemingcele emikhulu ebangeni futhi adinga amandla amaningi ukungena okuvimbelayo).