CSMA/CD and Channel Persistence Methods Quiz

What is the inefficiency of CSMA before the implementation of CSMA/CD?

Unstable channel until all packets are transmitted

How does CSMA/CD overcome the inefficiency of CSMA?

By aborting transmission after a collision

In CSMA/CD, what action should a station take if a collision is detected during transmission?

Abort transmission and send a jam signal

How does a node detect a collision in CSMA/CD?

By listening to the medium for its own signal Signup and view all the answers

What should a station do after sending a jam signal in CSMA/CD?

Back off and wait for a random amount of time Signup and view all the answers

What role does the CSMA persistence algorithm play in the CSMA/CD protocol?

Manages the detection and handling of collisions Signup and view all the answers

What is the maximum throughput for Pure Aloha according to the text?

1.5 Signup and view all the answers

In CSMA, what is considered the vulnerable time that affects protocol performance?

Maximum propagation time Signup and view all the answers

Which CSMA protocol involves a station waiting a random amount of time after the medium is detected busy to re-attempt transmission?

Non-Persistent CSMA Signup and view all the answers

What is the impact of longer propagation delay on CSMA protocol performance?

Worse performance Signup and view all the answers

What factor in local area networks can help reduce the possibility of collisions in CSMA?

Immediate knowledge of frame transmission Signup and view all the answers

Which type of CSMA protocol specifies that a station should transmit immediately after the medium becomes idle?

1-Persistent CSMA Signup and view all the answers

What is the main difference between 1-persistent and p-persistent CSMA protocols?

1-persistent protocol waits until the medium becomes idle, while p-persistent protocol transmits immediately with a probability of p. Signup and view all the answers

How does non-persistent CSMA handle idle medium?

Back off and wait a random amount of time Signup and view all the answers

Why is bandwidth wasted if waiting time (back off) is large in non-persistent CSMA?

Medium remains idle following the end of transmission Signup and view all the answers

What characteristic describes 1-persistent stations in CSMA?

Transmit immediately with probability 1 Signup and view all the answers

In p-persistent CSMA, what does a station do if the medium is idle?

Transmit immediately Signup and view all the answers

What does 1-persistent CSMA guarantee when two or more stations become ready to transmit simultaneously?

Collision will occur Signup and view all the answers