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TCP-reno

Posted on 2003-10-22
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Last Modified: 2013-11-29
Will TCP reno ever be forced to stop sending and wait for an acknowledgement in a satellite network? What about a modem network?
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Question by:jtcy
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5 Comments
 
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Expert Comment

by:cincin77
ID: 9597975
first of all, TCP is on top of data link so it does not care what the network is below it.
what do you exactly want to do?
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MaxQ earned 1000 total points
ID: 9610479
Some satellite providers will use land-based proxy systems that will
"fake" TCP ACKs to the end station to prevent things from timing out.
I've not heard of it being an issue with modems since latency is less
of an issue than poor bandwidth.  But I agree with cincin77, we need
more information to give useful answers.
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Author Comment

by:jtcy
ID: 9612899
Given two networks. One modem and one satellite. Modem has propagation delay of 0.025 sec and satellite has pd of 0.26 sec. Modem has bandwidth 56Kbits/sec and satellite has bandwidth 2Mbits/sec. Now, say we are sending file from A to B using the above methods. Comparing both,

1.In each of the networks, how much buffer space is needed to ensure that the sender is able to continuously send packets (assume 576 byte packets, 40 byte ACKs) until the first ACK is received?  

2.Is this amount practical in a modern computer?  

3. Is it possible to have this many unacknowledged bytes with TCP-reno?

4. Under what general conditions, if any, will a network be forced to stop sending and wait for an acknowledgement?
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Expert Comment

by:t1n0m3n
ID: 9631660
Yes boys and girls, it is no longer summer.
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Expert Comment

by:t1n0m3n
ID: 9631699
OK I have looked at all the questions jtcy has and it looks at though he/she has many open on basically the same set of questions.
There are some really cool answers in some of these questions.

I realize that this for school work, but the in-depth "geeky" nature of the questions has perked my ears.
And besides, jtcy seems to be really trying to grasp TCP concepts.
Links below are so that you can peruse some of the answers and questions posed.
http://www.experts-exchange.com/Networking/Q_20770838.html
http://www.experts-exchange.com/Networking/Q_20771530.html
http://www.experts-exchange.com/Networking/Q_20771688.html
http://www.experts-exchange.com/Networking/Q_20773026.html
http://www.experts-exchange.com/Networking/Q_20774356.html
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