msgid "" msgstr "" "Project-Id-Version: Czech (cnp3-ebook)\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2026-04-19 12:56+0200\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "Last-Translator: FULL NAME \n" "Language-Team: Czech \n" "Language: cs\n" "MIME-Version: 1.0\n" "Content-Type: text/plain; charset=UTF-8\n" "Content-Transfer-Encoding: 8bit\n" "Plural-Forms: nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;\n" "X-Generator: Weblate 5.14.3\n" #: ../../exercises/transport.rst:7 msgid "Serving applications" msgstr "" #: ../../exercises/transport.rst:10 msgid "" "This is an unpolished draft of the third edition of this e-book. If you find " "any error or have suggestions to improve the text, please create an issue " "via https://github.com/CNP3/ebook/issues?milestone=3 or help us by providing " "pull requests to close the existing issues." msgstr "" #: ../../exercises/transport.rst:14 msgid "Open questions" msgstr "" #: ../../exercises/transport.rst:18 msgid "" "A reliable connection oriented transport places a 32 bits sequence number " "inside the segment header to number the segments. This sequence number is " "incremented for each data segment. The connection starts as shown in the " "figure below :" msgstr "" #: ../../exercises/transport.rst:38 msgid "" "Continue the connection so that `Host B` sends `Hello` as data and `Host A` " "replies by sending `Pleased to meet you`. After having received the " "response, `Host B` closes the connection gracefully and `Host A` does the " "same. Discuss on the state that needs to be maintained inside each host." msgstr "" #: ../../exercises/transport.rst:40 msgid "" "A transport connection that provides a message-mode service has been active " "for some time and all data has been exchanged and acknowledged in both " "directions. As in the exercise above, the sequence number is incremented " "after the transmission of each segment. At this time, `Host A` sends two " "DATA segments as shown in the figure below." msgstr "" #: ../../exercises/transport.rst:57 msgid "" "What are the acknowledgments sent by `Host B`. How does `Host A` react and " "how does it terminate the connection ?" msgstr "" #: ../../exercises/transport.rst:60 msgid "" "Consider a reliable connection-oriented transport protocol that provides the " "bytestream service. In this transport protocol, the sequence number that is " "placed inside each DATA segment reflects the position of the bytes in the " "bytestream. Considering the connection shown below, provide the DATA " "segments that are sent by `Host A` in response to the `DATA.request`, " "assuming that one segment is sent for each `DATA.request`." msgstr "" #: ../../exercises/transport.rst:86 msgid "" "Same question as above, but consider now that the transport protocol tries " "to send large DATA segments whenever possible. For this exercise, we " "consider that a DATA segment can contain up to 8 bytes of data in the " "payload. Do not forget to show the acknowledgments in your answer." msgstr "" #: ../../exercises/transport.rst:88 msgid "" "Consider a transport protocol that provides a reliable connection-oriented " "bytestream service. You observe the segments sent by a host that uses this " "protocol. Does the time-sequence diagram below reflects a valid " "implementation of this protocol ? Justify your answer." msgstr "" #: ../../exercises/transport.rst:105 msgid "" "In the above example, the two `DATA` segments were lost before arriving at " "the destination. Discuss the following scenario and explain how the receiver " "should react to the reception of the last `DATA` segment." msgstr "" #: ../../exercises/transport.rst:122 msgid "" "A network layer service guarantees that a packet will never live during more " "than 100 seconds inside the network. Consider a reliable connection-oriented " "transport protocol that places a 32 bits sequence number inside each " "segment. What is the maximum rate (in segments per second) at which is " "should sent data segments to prevent having two segments with the same " "sequence number inside the network ?" msgstr "" #: ../../exercises/transport.rst:126 msgid "Practice" msgstr "" #: ../../exercises/transport.rst:128 msgid "" "Amazon provides the `S3 storage service `_ where " "companies and researchers can store lots of information and perform " "computations on the stored information. Amazon allows users to send files " "through the Internet, but also by sending hard-disks. Assume that a 1 " "Terabyte hard-disk can be delivered within 24 hours to Amazon by courier " "service. What is the minimum bandwidth required to match the bandwidth of " "this courier service ?" msgstr "" #: ../../exercises/transport.rst:135 msgid "Discussion questions" msgstr "" #: ../../exercises/transport.rst:137 msgid "" "In the transport layer, the receive window advertised by a receiver can vary " "during the lifetime of the connection. What are the causes for these " "variations ?" msgstr "" #: ../../exercises/transport.rst:139 msgid "" "A reliable connection-oriented protocol can provide a message-mode service " "or a byte stream service. Which of the following usages of the sequence " "numbers is the best suited for each of these services ?" msgstr "" #: ../../exercises/transport.rst:141 msgid "" "DATA segments contain a sequence number that is incremented for each byte " "transmitted" msgstr "" #: ../../exercises/transport.rst:142 msgid "" "DATA segments contain a sequence number that is incremented for each DATA " "segment transmitted" msgstr "" #: ../../exercises/transport.rst:144 msgid "" "Some transport protocols use 32 bits sequence numbers while others use 64 " "bits sequence number. What are the advantages and drawbacks of each approach " "?" msgstr "" #: ../../exercises/transport.rst:146 msgid "" "Consider a transport protocol that provides the bytestream service and uses " "32 bits sequence number to represent the position of the first byte of the " "payload of DATA segments in the bytestream. How would you modify this " "protocol so that it can provide a message-mode service ? Consider first " "short messages that always fit inside a single segment. In a second step, " "discuss how you could support messages of unlimited size." msgstr "" #: ../../exercises/transport.rst:148 msgid "What is piggybacking and what are the benefits of this technique ?" msgstr "" #: ../../exercises/transport.rst:155 msgid "Footnotes" msgstr ""