cnp3-ebook/exercises/reliability

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9 ../../exercises/reliability.rst:26
	English a Cyclic Redundancy Check (`CRC`)
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11 ../../exercises/reliability.rst:30
	English Derive a mathematical expression that provides the `goodput`, i.e. the amount of payload bytes that have been transmitted during a period of time, achieved by the Alternating Bit Protocol assuming that :
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12 ../../exercises/reliability.rst:32
	English Each frame contains `D` bytes of data and `c` bytes of control information
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13 ../../exercises/reliability.rst:33
	English Each acknowledgment contains `c` bytes of control information
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14 ../../exercises/reliability.rst:34
	English The bandwidth of the two directions of the link is set to `B` bits per second
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15 ../../exercises/reliability.rst:35
	English The delay between the two hosts is `s` seconds in both directions
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16 ../../exercises/reliability.rst:36
	English there are no transmission errors
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18 ../../exercises/reliability.rst:40
	English when there are no losses
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20 ../../exercises/reliability.rst:42
	English when every second acknowledgment is discarded due to transmission errors
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21 ../../exercises/reliability.rst:44
	English Same question when using selective repeat instead of go-back-n. Note that the answer is not necessarily the same.
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22 ../../exercises/reliability.rst:50
	English Practice
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23 ../../exercises/reliability.rst:52
	English Reliable protocols depend on error detection algorithms to detect transmission errors. The following questions will reinforce your understanding of these algorithms.
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24 ../../exercises/reliability.rst:54
	English Reliable protocols rely on different types of checksums to verify whether frames have been affected by transmission errors. The most frequently used checksums are :
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25 ../../exercises/reliability.rst:56
	English the Internet checksum used by UDP, TCP and other Internet protocols which is defined in :rfc:`1071` and implemented in various libraries.
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26 ../../exercises/reliability.rst:57
	English the 16 bits or the 32 bits Cyclical Redundancy Checks (CRC) that are often used on disks, in zip archives and in datalink layer protocols. See http://rosettacode.org/wiki/CRC-32 for CRC-32 implementations in various languages.
	Czech 0/2260 · 226 Needs editing
29 ../../exercises/reliability.rst:62
	English The Cyclic Redundancy Checks (CRCs) are efficient error detection codes that are able to detect :
	Czech 0/970 · 97 Needs editing
30 ../../exercises/reliability.rst:64
	English all errors that affect an odd number of bits
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31 ../../exercises/reliability.rst:65
	English all errors that affect a sequence of bits which is shorter than the length of the CRC
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32 ../../exercises/reliability.rst:67
	English Implement a small software that computes the CRC-32 for a text file. Then, modify the contents of the file to change an even number of bits or an odd number of bits inside the file. When modifying the file, remember that an ASCII file is composed of 8 bits characters that are encoded by using the ASCII table that you can find at : http://en.wikipedia.org/wiki/ASCII . You can also write a small program that produces binary files that are a small variation of each other.
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34 ../../exercises/reliability.rst:74
	English Discussion questions
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