Hub kya hai? हब क्या है ?

हब(Hub)

Hub एक नेटवर्क डिवाइस है जिसका उपयोग एक से ज्यादा  कंप्यूटर को एक साथ जोड़ कर एक छोटा नेटवर्क बनाने के लिए किया जाता है। एक हब (Hub) में कई पोर्ट होते हैं। आप कई कम्प्यूटर्स को इन पोर्ट से जोड़ सकते है।

hub ek network device hai jiska upayog ek se jyaada  computer ko ek saath jod kar ek chhota networrk banaane ke lie kiya jaata hai. ek hub me kaee port hote hain. aap kaee computer ko in port se jod sakate hai.

स्विचेस (Switches)

स्विच एक नेटवर्क हर्डवेयर डिवाइस है और LAN मैं कई कंप्यूटर को जोड़ने के लिए प्रयोग किया जाता है। स्विच हब के समान होते हैं परंतु उससे ज्यादा कार्य कुशल होते हैं। इनका प्रयोग साधारणतया बड़े नेटवर्क ट्रैफिक वाले क्षेत्रों में किया जाता है।

http://network.ind.in/wp-content/uploads/2020/05/hub-273x300.jpeg

Switch ek network hardware device hai aur lan main kaee computer ko jodane ke liye prayog kiya jaata hai. Switch hub ke samaan hote hain parantu usase jyaada kaary kushal hote hain. Inaka prayog saadhaaranataya bade network traffic waale kshetron mein kiya jaata hai.

हब और स्विच में अंतर- Hub aur Switch me antar

मान लीजिये चार कंप्यूटर(PC) एक हब से कनेक्ट हैं, उनमें  से एक कंप्यूटर ने, नेटवर्क में दूसरे कम्प्यूटर को कोई डाटा भेजा, तब Hub डाटा को जाने बिना ही दूसरे जो कम्प्यूटर हब से connect हैं उनको भेज देता है जिससे वो कंप्यूटर भी उस डाटा को एक्सेस कर लेते हैं | दूसरी ओर स्विच प्राप्त डाटा पैकेट को जांच कर और उसके स्रोत एवं कार्य को जानकर भेजता है इसलिए व्यस्त नेटवर्क पर स्विच हब से अच्छा कार्य करता है।

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maan lijiye chaar computer(pc) ek hub se connect hain, uname  se ek computer ne, network me doosare computer ko koee daata bheja, tab hub daata ko jaane bina hi dusare jo computer hub se connect hain unako bhej deta hai jisase vo computer bhi us daata ko access kar lete hain . doosaree or switch praapt daata paiket ko jaanch kar aur usake shrot aur kaarya ko jaanakar bhejata hai isliye vyast network par switch hub se achchha kaarya karata hai.

रिपीटर (Repeater)

रिपीटर एक नेटवर्किंग हार्डवेयर डिवाइस है जो ट्रांसमिशन कंट्रोल प्रोटोकोल इंटरनेट प्रोटोकॉल मॉडल के फिजिकल लेयर पर कार्य करता है यह समान LAN के दो भागो को जोड़ता है एक सिग्नल जो सूचना को ले जाता है उसकी गुणवत्ता के कम होने से पहले बहुत ही कम दूरी तय कर सकता है| जब रिसीवर किसी कमजोर सिग्नल को प्राप्त करता है तो वह वास्तविक सिग्नल को वास्तविक बिट पैटर्न के लिए तैयार कर देता है।

Repeater ek networrking hardware device hai jo transmission control protocol Internet protocol model ke physical layer par kaarya karta hai yah samaan LAN ke do bhaago ko jodata hai ek signal jo soochana ko le jaata hai usakee gunavatta ke kam hone se pahale bahut hee kam dooree tay kar sakata hai| jab riseevar kisi kamjor signal ko praapt karata hai to vah vaastavik signal ko vaastvik bit pattern ke lie taiyaar kar deta hai.

ब्रिज(Bridge) 

ब्रिज एक हार्डवेयर डिवाइस है जो ओएसआई मॉडल के फिजिकल और डाटा लिंक लेयर दोनों में कार्य करता है। फिजिकल लेयर डिवाइस होने के कारण ब्रिज का यह कार्य है कि प्राप्त किए गए कमजोर सिग्नल को पुनः पैदा कर दे और डाटा लिंक लेयर होने के कारण साधन और स्थान नोड के एड्रेस को चेक करें यह एड्रेस डाटा फ्रेम में होता है जिसमें सूचनाएं जैसे- डाटा बीट्स, साधन  और कार्य का एड्रेस होता है।

http://network.ind.in/wp-content/uploads/2020/05/bridge-300x225.jpeg

Bridge ek hrdware device hai jo OSI model ke physical aur daata link layer dono mein kaarya karata hai. phijikal layer device hone ke kaaran bridge ka yah kaary hai ki praapt ki gai kamjor signal ko dobara paida kar de aur daata link layer hone ke kaaran saadhan aur sthaan node ke address ko check kare yah address data frame me hota hai jisme soochanae jaise- daata bits, saadhan  aur kaarya ka address hota hai

राउटर (Router) 

राउटर एक नेटवर्किंग हार्डवेयर डिवाइस है जो LAN अथवा WAN को इंटरनेट पर कनेक्ट करता है । यह ओ एस आई मॉडल के नेटवर्क लेयर की तरह कार्य करता है राउटर में एक रूटिंग टेबल होता है जो डाटा पैकेट के रूप को निर्धारित करता है। Routing table में साधन और स्थान नोड के आईपी ऐड्रेस होते हैं। राउटर नेटवर्क से पैकेट प्राप्त करता है, उसके स्थान के आईपी एड्रेस के लिए चेक करता है और उसे सही स्थान पर भेजता है।

http://network.ind.in/wp-content/uploads/2020/05/router-300x252.jpeg

Router ek networking hardware device hai jo LAN athava WAN ko internet par connect karata hai . yah OSI model ke network layer tarah kaarya karata hai routr mein ek rooting tabel hota hai jo data packet ke roop ko nirdhaarit karata hai. routing table mein saadhan aur sthaan node ke IP Address hote hain. routar network se packet praapt karta hai, uske sthaan ke IP address ke liye check karata hai aur use sahi sthaan par bhejata hai.

Hub kya karta hai (हब क्या करता है )

हब (Hub)और स्विच आपके सभी नेटवर्क उपकरणों के लिए एक केंद्रीय कनेक्शन के रूप में काम करते हैं और फ़्रेम के रूप में जाने वाले डेटा प्रकार को संभालते हैं। फ्रेम्स आपके डेटा को ले जाते हैं। जब एक फ्रेम प्राप्त होता है, तो इसे व्यवस्थित किया जाता है और फिर गंतव्य पीसी के अन्दर प्रेषित किया जाता है।

hub aur switch aapke sabhi network upakarano ke liye ek kendriy connection ke roop me kaam karte hain aur frame ke roop mein jaane waale data prakaar ko sambhaalate hain. frames aapake data ko le jaate hain. jab ek frame praapt hota hai, to ise vyavasthit kiya jaata hai aur phir gantavy PC ke andar preshit kiya jaata hai.

    
हब (Hub) में, इसके हर एक पोर्ट के साथ एक फ्रेम या “प्रसारण” किया जाता है। इससे कोई फर्क नहीं पड़ता कि फ्रेम केवल एक पोर्ट के लिए नियत है। हब में यह अंतर करने का कोई तरीका नहीं है कि किस पोर्ट को एक फ्रेम भेजा जाना चाहिए। इसे हर लक्ष्य तक पहुँचाना सुनिश्चित करता है कि यह अपने इच्छित गंतव्य तक पहुँचे। यह नेटवर्क पर बहुत अधिक ट्रैफ़िक देता है और खराब नेटवर्क प्रतिक्रिया समय का कारण बन सकता है।

Hub me, isake har ek port ke saath ek frame ya “prasaaran” kiya jaata hai. isase koee phark nahin padata ki frame keval ek port ke liye niyat hai. hub mein yah antar karane ka koi tareeka nahin hai ki kis port ko ek frame bheja jaana chahiye. ise har lakshy tak pahunchaana sunishchit karata hai ki yah apane ichchhit gantavy tak pahunche. yah network par bahut adhik traffic deta hai aur kharaab network pratikriya samay ka kaaran ban sakata hai

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