CSMA Protocol in computer network in hindi

Carrier Sense Multiple Access (CSMA) ek media access protocol hai jo Ethernet networks mein shared communication medium ki access ko control karta hai. CSMA ke dwara multiple devices ek hi medium ko share kar sakte hain aur data collisions ko avoid kar sakte hain. CSMA ke do variations hote hain:

इसे भी पढ़ें:-

CSMA/CD Protocol in computer network in hindi

  1. CSMA/CD (Carrier Sense Multiple Access with Collision Detection): Ye protocol traditional Ethernet networks mein istemal hota hai. Iska kaam kaise karta hai:

    • Carrier Sense: Data transmit karne se pahle, device medium ko sense karta hai aur check karta hai ki medium khali hai ya nahi (koi dusra device transmit nahi kar raha hai).Collision Detection: Data transmit karte samay, device medium ko continuously monitor karta hai collision detection ke liye.


    • Agar collision detect hoti hai (yani koi aur device saath mein transmit karna shuru kar deta hai), toh device transmit karna band kar deti hai, collision ko indicate karne ke liye jam signal bhejti hai, aur retransmit karne se pahle random time wait karti hai.Random Backoff: Collision ke baad, devices random time wait karte hain retry karne se pahle, jisse dobara collision hone ke chances kam ho jate hain.
CSMACD Protocol in hindi
CSMACD Protocol in hindi

CSMA/CD collisions ko detect aur handle karne mein kaafi effective hai aur devices ke beech medium ki sahi access ko ensure karta hai. Lekin aajkal ke Ethernet networks mein hubs ke bajaye switches istemal hone ke karan collisions ke chances kam ho gaye hain, isliye CSMA/CD kam istemal hota hai.

CSMA/CA Protocol in computer network in hindi

  1. CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance): Ye protocol wireless networks, jaise Wi-Fi, mein istemal hota hai. CSMA/CA wireless communication ke khaas challenges, jaise signal interference aur hidden terminal problems, ko handle karne ke liye design kiya gaya hai. Iska kaam kaise karta hai:
    • Carrier Sense: Transmit karne se pahle, device wireless medium ko sense karta hai aur check karta hai ki medium khali hai ya nahi.

    • Collision Avoidance: Collisions ko avoid karne ke liye, devices RTS (Request to Send) aur CTS (Clear to Send) packets ka istemal karte hain data transmit karne se pahle. Transmitting device receiving device ko RTS packet bhejta hai, jisse permission transmit karne ke liye maangta hai. Agar receiving device CTS packet ke saath reply karta hai, jisse indicate hota hai ki channel khali hai, tab transmitting device data transmission shuru kar sakta hai.

    • Virtual Carrier Sensing: Wireless networks mein hidden terminal problem ke karan, jahaan devices ek doosre ke transmissions nahi sun sakte, CSMA/CA virtual carrier sensing mechanism ka istemal karta hai. Devices receiving device se ACK (Acknowledgment) paket sunte hain, jisse successful data transmission ensure hoti hai.
CSMACD Protocol in hindi
CSMACD Protocol in hindi

CSMA/CA collisions ko minimize karne aur wireless communication ki reliability ko improve karne ke liye carrier sensing, collision avoidance, aur acknowledgment mechanisms ka istemal karta hai.

CSMA/CD aur CSMA/CA protocols dono hi media access ke liye fundamental hain aur Ethernet aur wireless networks mein efficient aur collision-free data transmission ko enable karte hain.

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