Solved

about Lan/Ethernet

Posted on 2012-03-18
5
174 Views
Last Modified: 2012-03-24
When a collision occurs, IEEE 802.3 systems use an algorithm called binary exponential back off to calculate the random amount of time the sender must wait before at-tempting to retransmit the frame. For each of the retransmissions, the algorithm doubles the range of the random delay. After n collisions, the system will wait for a random amount of time, in the range from 0 to 2^n -1 units of time before attempting to retransmit the frame. Analyze the advantages of this design decision.
0
Comment
Question by:Aplle
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 7

Expert Comment

by:Martin81
ID: 37735284
Clearly homework. Stop being lazy and google it.
0
 

Author Comment

by:Aplle
ID: 37735417
I could not find out the answers by myself, so I asked help from this website( not for free). So I do not have any reasons to see the answer like that.
0
 
LVL 39

Expert Comment

by:Aaron Tomosky
ID: 37736145
It's really more of an opinion anyway. I'll give you one advantage:
Increasing the time after each collision is a good idea so that the network doesn't get even more congested when there is a collision.
0
 
LVL 5

Expert Comment

by:abhishek1986
ID: 37736320
It helps reducing load on network, but the downside is that if the medium is heavy on load, there may be the possibility of complete transmission failure as well as the possibility of a random transmission time. So it is kind of impractical on heavily loaded networks where there will be more instances of transmission failing, and if transmission for a particular packet fails for more than the defined number of times, the packet is dropped.
0
 
LVL 5

Accepted Solution

by:
andrew1812 earned 500 total points
ID: 37737191
The randomness is the key here. If it is not for the random number, each device would retransmit at a constant interval and collisions would keep on recurring. Since the devices back off for a 'random time' the chances of collisions between stations repeating is significantly reduced.
0

Featured Post

Migrating Your Company's PCs

To keep pace with competitors, businesses must keep employees productive, and that means providing them with the latest technology. This document provides the tips and tricks you need to help you migrate an outdated PC fleet to new desktops, laptops, and tablets.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

What is an ISAPI filter?   •      It's an assembly (.dll file) that can add or change the way IIS works.   •      They can be enabled globally for your web server or on a site-by-site basis.   When the IIS server receives a request, enabling the ISAPI fi…
When it comes to showing a 404 error page to your visitors, you do not want that generic page to show, and you especially do not want your hosting provider’s ad error page to show either. In this article, I will show you how to enable the custom 40…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question