ACE MOCK TEST

Question

what is the difference between CSMA/CD and CSMA/CA

Comments

Option A

---

yes i know the ans but what to know how it works like i know how csma/cd works but how this csma/ca works???

---

well Thats a big explaination.......please refer Data communications and network Written by furouzen and in that MAC Chapter......I wish you would get clear with the concepts

---

wireless means media is air. in this medium, we can't know collision happens or not ( i.e., we can't detect the collision ) therefore we are try to avoid the Collision it self ===> in 802.11 we use CSMA/CA

Answer 1

Wi-fi works on Collision avoidance since there is no phenomenon of detection in case of wifi . BUt in case of ETHERNET there exists a physical link when ever a station sends data it listen to medium to avoid the collision . But i case of wifi listiening  is not posible bcoz of no physical link .

So wifi works on CSMA /CA

Ethernet works o CSMA/ CD