Assignment Question

Posted on 1998-11-09
Last Modified: 2008-03-17
As a possible congestion control mechanism in a subnet using virtual circuits internally, a router cou1d refrain from acknowledging a received packet until (1) it knows its last transmission along the virtual circuit was received successfully and (2) it has a free buffer.  For simplicity, assume that the routers use a stop-and-wait protocol and that each virtual circuit has one buffer dedicated to it for each direction of traffic.  If it takes T sec to transmit a packet (data or acknowledgement) and there are n routers on the path, what is the rate at which packets are delivered to the destination host?  Assume that transmission errors are rare, and that the host-router connection is infinitely fast.
Question by:cbgold
  • 3

Accepted Solution

G0LIATH earned 100 total points
ID: 1012335

Expert Comment

ID: 1012336
Oops I mean
LVL 12

Expert Comment

ID: 1012337
Don't do his homework for him!



Author Comment

ID: 1012338
I like discussion only.  If you can create an wrong answer that can convince me, you will be a real expert instead of just criticizing on others.  

Besides, do you think that this answer can hand on to the teacher???  ----  very old assignments without answer ....

Expert Comment

ID: 1012339
A packet is sent from A to B = 1T
B acknowledges reciept       = 1T
A can now send another packet or one packet every 2T
So from computer 1 to computer 2 is 2T times the # of routers n plus T from the last router to computer 2.
Computer 2 recieves the packet 2T*n+T seconds after Computer 1 starts sending.

Featured Post

Backup Your Microsoft Windows Server®

Backup all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

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

Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
Moving your enterprise fax infrastructure from in-house fax machines and servers to the cloud makes sense — from both an efficiency and productivity standpoint. But does migrating to a cloud fax solution mean you will no longer be able to send or re…
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.
Many functions in Excel can make decisions. The most simple of these is the IF function: it returns a value depending on whether a condition you describe is true or false. Once you get the hang of using the IF function, you will find it easier to us…

863 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

Need Help in Real-Time?

Connect with top rated Experts

23 Experts available now in Live!

Get 1:1 Help Now