basic csma/cd [closed]

Question

confusion ;-

in csma/cd let there are many devices

let the device wants to transmit a packet and channel is ideal than it will continue transfer the packet to channel.

While during the transmission there is collision . Will the device do continuously transmit the packet or go to binary back off?

Comments

if two station transmit data at the same time and collision is accure  then the station send the jamming signal of all the station there is a collision . and apply  back of algorithm.

Answer 1

If a collision has been detected by a station in CSMA/CD, then the station will wait based on the time of backoff algorithm which makes station to wait so that, there is less probability of collision in the next transmit.

 And also to send the packet, it will again sense the carrier whether it is free or not, then only it will send back.

Please correct me if i am wrong.

Comments

More detailed solution.   

lets us consider that there are two station A and B. at first both sense that the channel is ideal.so both will send their data or frame on the channel.lets us assume A will send data first and then B will so when both

data collide . then Binary exponential backoff algorithm will be called. and will that do is .it will stop the transmition of the data abruptly and will fored to send data al over again.and will also generate random time after which it will send data. ex for A =0 and B = 1. so A will send data first and then B. so this will stop the collision.and if they collide again then A can generate(0,1,2,3) number any one of then and simlary B will.so this will again reduce the prbablity of colliding .

remember two station cannot have same random time other wise it will again colllide

 

please correct me if i m wrong anywhere