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*** In CSMA/CD it detects that a collision take place and resend the frame that was send. On a wirless network losing bandwidth along with time to detect that a collision took place was not acceptable , so CSMA/CA was utilized. ** CSMA/CD can achieve above 70% efficiency under heavy loads compared to CSMA/CA that can only achieve up to 30% efficiency under heavy loads. CSMA/CA network: A network in which the medium access control protocol requires carrier sense and where a station always starts transmission by sending a jam signal; if there is no collision with jam signals from other stations, it begins sending data; otherwise, it stops transmission and then tries again later. CSMA/CD network: A bus network in which the medium access control protocol requires carrier sense and in which exception conditions caused by collision are resolved by retransmission
Wiki User
∙ 15y ago
Wiki User
∙ 14y agomy question is:Difference between CSMA/CD and CSMA/CA ?
they are protocols to send data on LAN, they come under LLC control layer (under DLL).
CSMA/CD:-
CSMA=> before sending data the LAN/connecting media is checked for free, if it is free then only data is sent otherwise data is not sent.
CD => collosion detection: If some times collision occurs in the LAN then as soon as it is detected by the computers over the LAN they will stop the transmission (instead of transmitting till the end) and will retransmit after waiting for the random period of time.
CSMA/CA: it is also similar to CSMA but the only difference is that it is used for the wireless media ie 802.11; where the computer nodes are hidden.
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What is the primary function of csma CD in an Ethernet network?
it prevents the collision between the data that is sended by the network cards over ethernet networks
Which is a drawback of the CSMA CD access method?
Collisions can decrease network performance.
Which of these options are characteristics of the Ethernet data transmission standard?
Data transmissions is via frames, each having a single MAC address. The CSMA/CD access method is used to detect collisions.
What is the difference between hardware and soft ware?
The difference between hardware and software is that hardware is something physical. It is something you can touch. For example, a CD and its CD-ROM drive is hardware, but the music that is recorded on it is the software.
What is the purpose of the Frame Check Sequence field in a Data Link frame trailer?
The purpose of the FCS field is to transmit the extra checksum characters added to a frame in "xyz" protocol for error detection. The most popular algorithm I've used is the CRC (cyclic redundancy check) employed in things like ethernet or PPP on a routed network. Keep in mind that ethernet defines that the errored frame should be discarded, but ethernet takes no action to cause the frame to be retransmitted. Typically most tech's see it as unnecessary overhead and opt to rely on CSMA\CD or CSMA\CA if the route is not deemed to carry time sensitive data. Hope that clears things up a bit.
Which access method is used by Ethernet?
CSMA/CD: Carrier Sense Multiple Access / Collision Detection.
What does the acronym CSMA CD stand for?
The acronym CSMA CD stands for Carrier Sense Multiple Access with Collision Detection. CSMA CD is a set of rules determining how network devices respond when two devices attempt to use a data channel simultaneously.
Which Ethernet standards supports csma CD?
10BaseT
Why csma CD not applicable in mobile ad hoc networks?
Because CSMA/CD does not prevent Hidden terminal problem. so it is onlly applicable in Wired networks.
Which is an access method in which collision is entirely avoided?
Csma/cd
Describe one protocol used for Local Area Network?
IP, appletalk, token ring, CSMA/CD, CSMA/CA
What is the primary function of csma CD in an Ethernet network?
it prevents the collision between the data that is sended by the network cards over ethernet networks
Which is a drawback of the CSMA CD access method?
Collisions can decrease network performance.
Mechanisms used on Ethernet networks to control access to transmission medium?
Csma/cd
Difference between CD-r and CD r?
The only difference is the hyphen.
What is the difference between CD-R and CD r?
== ==
What is the difference between a CD-ROM and a CD-ROM drive?
The same as the difference between a phonograph record and a phonograph. The CD-ROM is where the data is stored. the purpose of the CD-ROM drive is to read it.
