Which is the protocol used in ethernet. (CSMA/CD) Why is it
called so ?

Answers were Sorted based on User's Feedback

Which is the protocol used in ethernet. (CSMA/CD) Why is it called so ?..

Answer / vijaysivadas

CSMA/CD -Its called the carrier Sense Multiple
Access /Collision Detection

Each interface must wait until there is no signal on the
channel, then it can begin transmitting. If some other
interface is transmitting there will be a signal on the
channel, which is called carrier. All other interfaces must
wait until carrier ceases before trying to transmit, and
this process is called Carrier Sense.

All Ethernet interfaces are equal in their ability to send
frames onto the network. No one gets a higher priority than
anyone else, This is what is meant by Multiple Access.
Since signals take a finite time to travel from one end of
an Ethernet system to the other, the first bits of a
transmitted frame do not reach all parts of the network
simultaneously. Therefore, it's possible for two interfaces
to sense that the network is idle and to start transmitting
their frames simultaneously. When this happens, the
Ethernet system has a way to sense the "collision" of
signals and to stop the transmission and resend the frames.
This is called Collision Detect.

Is This Answer Correct ?    5 Yes 1 No

Which is the protocol used in ethernet. (CSMA/CD) Why is it called so ?..

Answer / anil

CSMA/CD is a media access control mechanism used in Ethernet
to recover from frame collision. The following steps are
followed to recover from a collision.
Step 1: Before an Ethernet device sends a frame on the
Ethernet cable, it listens to find if another device is
already transmitting a frame (Carrier Sense).
Step 2: Once the device finds that other devices are not
transmitting any frame, it starts transmitting the frame. If
two devices detect that the Ethernet cable is free at the
same time, then both will start transmitting the frames
(Multiple Access). This will result in collision.
Step 3: The Ethernet devices while transmitting the frames,
also listen for the collision. (Collision Detect).
Step 4: If they detect a collision, both the devices stop
sending the frame (back off).
Step 5: They retry the transmission after a logarithmic
time-out period. This process is repeated till the frame is
transmitted successfully, for a maximum of 16 times. The
frame is discarded after the 16th retry.

Is This Answer Correct ?    4 Yes 1 No

Post New Answer

More Networking AllOther Interview Questions

can we use pc as router?

1 Answers  

waht is DHCP?

8 Answers   HCL, Arvind,

what is the troublshooting the network

17 Answers   DELL,

How to communicate between difference process?

0 Answers  

Explain CSMA/CD

0 Answers  

what is vpn and describe the diffrence between ras and vpn

1 Answers   jetking,

Tell the correct definition of router, hub and switch and where do we use these?

2 Answers   Genpact,

What are the networking protocol options for the Windows clients if for some reason you do not want to use TCP or IP?

0 Answers  

Data link protocols almost always put the CRC in a trailer rather than in a header. Why?

1 Answers  

What is sliding window protocol ?

0 Answers  

what are the two sub layers of data link layer called ?

0 Answers  

Assume you have to build 30 systems (mix of Solaris + Linux) in a brand new place (ie: no existing infrastructure). How do you tackle this?

0 Answers  

  • Networking Protocols Interview Questions Networking Protocols (296)
  • Networking Administration Interview Questions Networking Administration (888)
  • Networking Security Interview Questions Networking Security (70)
  • Networking AllOther Interview Questions Networking AllOther (386)