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Geek Culture / A question about protocol types in the transport layer

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Mr Z
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Posted: 9th Mar 2009 13:20
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Hi all.

In school we are doing this work on the different layers in the Internet network model. One of the questions is about the protocol types in the transport layer, namely Alterning-bit, Go-Back-N, and Selective-Repeat. I can use wikipedia to find out what they do, but there is one problem. I need to know when which is appropriate to use when, and what their strengths and weaknesses are. Can anyone help we with this? Or link me to a good, understandable source of information?

Take care,
Mr Z.

There is no greater virtue, then the ability to face oneself.
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IanM
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Posted: 9th Mar 2009 21:02
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I was of the understanding that the transport layer protocols are TCP (byte stream), UDP (datagram) and suchlike, where you appear to be talking about the data link layer or the physical layer ... assuming you're also talking about the OSI network layer model.

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Mr Z
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Posted: 10th Mar 2009 09:59
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I am talking about the transport layer. This is the protocol types I meant:
http://en.wikipedia.org/wiki/Alternating_bit_protocol
http://en.wikipedia.org/wiki/Go-back-N
http://en.wikipedia.org/wiki/Selective_Repeat_ARQ

TCP is, according to our teacher, a form of combination of Go-Back-N and Selective Repeat. Anyway, this is how it appear to me now. Alternating bit is secure but slow, Go-Back-N is secure and fast, but does not buffer the data, and Selective Repeat also buffers the data (have not read the entire article on this one yet.

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