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40 strings / 936 words

	Translation	Source string	Target string
	cnp3-ebook/exercises/reliability — Czech	Reliable transfer
	cnp3-ebook/exercises/reliability — Czech	Open questions
	cnp3-ebook/exercises/reliability — Czech	Transmission links have sometimes different upstream and downstream bandwidths. A typical example are access networks that use ADSL (Asymmetric Digital Subscriber Lines). Consider two hosts connected via an ADSL link having an upstream bandwidth of 1 Mbps and a downstream bandwidth of 50 Mbps. The propagation delay between the two hosts is 10 milliseconds. What is the maximum throughput, expressed in frames/second, that the alternating bit protocol can obtain on this link if each data frame has a length of 125 bytes and acknowledgments are 25 bytes long. Same question if the protocol is modified to support 1500 bytes long data frames.
	cnp3-ebook/exercises/reliability — French	Transmission links have sometimes different upstream and downstream bandwidths. A typical example are access networks that use ADSL (Asymmetric Digital Subscriber Lines). Consider two hosts connected via an ADSL link having an upstream bandwidth of 1 Mbps and a downstream bandwidth of 50 Mbps. The propagation delay between the two hosts is 10 milliseconds. What is the maximum throughput, expressed in frames/second, that the alternating bit protocol can obtain on this link if each data frame has a length of 125 bytes and acknowledgments are 25 bytes long. Same question if the protocol is modified to support 1500 bytes long data frames.
	cnp3-ebook/exercises/reliability — Czech	How would you set the duration of the retransmission timer in the alternating bit protocol ?
	cnp3-ebook/exercises/reliability — Czech	A version of the Alternating Bit Protocol supporting variable length frames uses a header that contains the following fields :
	cnp3-ebook/exercises/reliability — Czech	a `number` (0 or 1)
	cnp3-ebook/exercises/reliability — Czech	a `length` field that indicates the length of the data
	cnp3-ebook/exercises/reliability — Czech	a Cyclic Redundancy Check (`CRC`)
	cnp3-ebook/exercises/reliability — Czech	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 :
	cnp3-ebook/exercises/reliability — Czech	Each frame contains `D` bytes of data and `c` bytes of control information
	cnp3-ebook/exercises/reliability — Czech	Each acknowledgment contains `c` bytes of control information
	cnp3-ebook/exercises/reliability — Czech	The bandwidth of the two directions of the link is set to `B` bits per second
	cnp3-ebook/exercises/reliability — Czech	The delay between the two hosts is `s` seconds in both directions
	cnp3-ebook/exercises/reliability — Czech	there are no transmission errors
	cnp3-ebook/exercises/reliability — Czech	when there are no losses
	cnp3-ebook/exercises/reliability — Czech	when every second acknowledgment is discarded due to transmission errors
	cnp3-ebook/exercises/reliability — Czech	Same question when using selective repeat instead of go-back-n. Note that the answer is not necessarily the same.
	cnp3-ebook/exercises/reliability — Czech	Practice
	cnp3-ebook/exercises/reliability — Czech	Reliable protocols depend on error detection algorithms to detect transmission errors. The following questions will reinforce your understanding of these algorithms.
	cnp3-ebook/exercises/reliability — Czech	Reliable protocols rely on different types of checksums to verify whether frames have been affected by transmission errors. The most frequently used checksums are :
	cnp3-ebook/exercises/reliability — Czech	the Internet checksum used by UDP, TCP and other Internet protocols which is defined in :rfc:`1071` and implemented in various libraries.
	cnp3-ebook/exercises/reliability — French	the Internet checksum used by UDP, TCP and other Internet protocols which is defined in :rfc:`1071` and implemented in various libraries.
	cnp3-ebook/exercises/reliability — Czech	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.
	cnp3-ebook/exercises/reliability — French	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.
	cnp3-ebook/exercises/reliability — Czech	The Cyclic Redundancy Checks (CRCs) are efficient error detection codes that are able to detect :
	cnp3-ebook/exercises/reliability — Czech	all errors that affect an odd number of bits
	cnp3-ebook/exercises/reliability — Czech	all errors that affect a sequence of bits which is shorter than the length of the CRC
	cnp3-ebook/exercises/reliability — Czech	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.
	cnp3-ebook/exercises/reliability — French	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.
	cnp3-ebook/exercises/reliability — Czech	Discussion questions
	cnp3-ebook/exercises/reliability — Czech	Consider two high-end servers connected back-to-back by using a 10 Gbps interface. If the delay between the two servers is one millisecond, what is the throughput that can be achieved by a reliable protocol that is using 10,000 bits frames and a window of
	cnp3-ebook/exercises/reliability — French	Consider two high-end servers connected back-to-back by using a 10 Gbps interface. If the delay between the two servers is one millisecond, what is the throughput that can be achieved by a reliable protocol that is using 10,000 bits frames and a window of
	cnp3-ebook/exercises/reliability — Czech	one frame
	cnp3-ebook/exercises/reliability — Czech	ten frames
	cnp3-ebook/exercises/reliability — Czech	hundred frames
	cnp3-ebook/exercises/reliability — Czech	Is it possible for a go-back-n receiver to inter-operate with a selective-repeat sender ? Justify your answer.
	cnp3-ebook/exercises/reliability — Czech	Is it possible for a selective-repeat receiver to inter-operate with a go-back-n sender ? Justify your answer.
	cnp3-ebook/exercises/reliability — Czech	Same question as above, but assume now that both the sender and the receiver implement selective repeat. Note that the answer can be different from the above question.
	cnp3-ebook/exercises/reliability — French	Same question as above, but assume now that both the sender and the receiver implement selective repeat. Note that the answer can be different from the above question.

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