Wednesday, 24 January 2018

WHAT IS WIFI AND HOTSPOT

duniya bhar mein wifi internet tak pahuchane ka pasandeeda tareeka banata ja raha hai. is tarah ka connection paane ke liye aapke computer me wireless adepter hona anivaary hai. wifi wireless connectivity dene ke liye network par jitana daata upalabdh hai usake mutaabik 2.4 ghz se 5 ghz ke beech kee dhvani tarange chhodta hai. jis aria mein wifi connectivity ho jaatee hai use hot-spot kahte hain. hotspot ka connection paane ya usaka pata lagaane ke liye aapako wirelss mon jaise unnat software ki jaroorat hogee. wireless connection ko shuroo karane ke liye sabase pehalee jaroorat hai wireless router. wireless router ko pehale internet connection mein jode aur isake baad dekhe ki saaree jaroori setting theek se lagee huee hain ya nahin. 




WIFI KYA HAI AUR YE KESE KAAM KARATA HAI?
haal hee me wireless technology duniya bhar mein bade paimaane par istemaal kee ja rahee hai. ab aap laga bhag har jagah network aur internet se connected ho. phir chaahe ghar mein, daftar mein, library mein,hotel, school, yahaan tak ki kuchh restaurant mein bhee.
to isee wireless networking ko wifi(wireless fidelity) ya 802.11 networking kahate hain kyonki ye IEEE 802.11 technology ko cover karta hai. wifi ka sabase bada faayda ye hai ki yah laga bhag har operating system, game device aur unnat printer ke saath taalamel bitha leta hai.


WIFE KAAM KAISE KARTA HAI?


mobile phone kee tarah, network mein soochana ke aadaan-pradaan karane ke liye wife network radio tarangon ka istemaal karata hai. wifi lagaane ke liye sabase pehala kadam hai computer mein wireless adepter lagaana jo data ko radio signal ke roop mein transmit karega. yahee signal antenna ke jariye router ke naam se jaana jaane vaala decoder tak bheja jayega. ek baar decode hone par vah data wired Ethernet connection kee madad se internet ko bheja jayega. kyonki wireless network two way traffic jaisa kaam karta hai isaliye internet se jo data receive hoga vo router se bhee gujrega aur radio signal mein coded ho jayega. phir is radio signal ko computer ka wireless adepter receive kar lega.

FREQUENCY

user jo data bhejta hai use rupaantarit  karne ke liye wireless network 2.4 ghz ya 5 ghz ke aavrtti star par transmit karega. jaisa kee aage vyaakhya kee gayee hai ki maanak 802.11 networking kuch had tak user kee jaroorton par nirbhar karata hai.

802.11E data ko 5 ghz ke aavrtti star par sanchaarit karega. yahaa upayog ho raha orthogonal frequency division multiplexing  radio signal ko router tak pahuchane se pehale chhote chhote signal mein vibhaajit kar deta hai jisse data reception jyaada hota hai. aap adhiktam per second 54 megabytes data sanchaarit kar sakte hain. vahee 802.11B 2.4 ghz ke aavrtti star par data sanchaarit karega. ye dheemee gati hai. yahaan aap adhikatam 11 megabytes daata per second sanchaarit kar sakate hain

isee prakaar 802.11G 2.4 ghz kee aavrtti star par data sanchaarit karega. kyonki ye ofdm coding ka upayog karta hai isaliye ye adhikatam 54 megabytes per second kee gati se data ko sanchaarit kar sakata hai. tulanaatmak roop se adhik 802.11N adhiktam 40 megabytes data per second sanchaarit kar sakta hai. ye 5 ghz ke aavrtti star ka istemaal karata hai.

HOTSPOT KYA HAI?


Hotspot shabd ka istemaal us aria ko paribhaashit karane ke liye kiya jaata hai jahaa wifi kee suvidha upalabdh ho. ya to ghar ya restaurant jaise saarv janik jagaho par band wireless network hota hai. jaisa ki hamne pehale bhee kaha hai, hotspot kee suvidha paane ke liye aapke computer me wireless adepter hona chahiye. yadi aap naye aur aadhunik laptop model ka istemaal kar rahe hain to sambhavatah isake bheetar pehale se hee wireless transmitter suvidha  hotee hai. yadi aisa nahin hai to aapko ek wireless adepter khareedana hoga jise aap ya to pc slot ya usc port mein plug kare. ek baar lag jaane ke baad aapka system apne aap wifi hotspot ko khoj lega aur connection ke liye nivedan karega.



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