cnp3-ebook/exercises/tcp-2 — English @ Weblate

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62 ../../exercises/tcp-2.rst:834

	English Same question, but assume now that the fourth segment delivered by the sender experienced congestion (but was not discarded). 125/10000 · 125
63 ../../exercises/tcp-2.rst:837

	English A TCP connection has been active for some time and has reached a congestion window of 4000 bytes. Four segments are sent, but the second (shown in red in the figure) is corrupted. Complete the time-sequence diagram. 215/10000 · 215
64 ../../exercises/tcp-2.rst:871

	English Footnotes 9/10000 · 9
65 ../../exercises/tcp-2.rst:876

	English On Linux, most of the parameters to tune the TCP stack are accessible via :manpage:`sysctl`. These parameters are briefly described in https://github.com/torvalds/linux/blob/master/Documentation/networking/ip-sysctl.txt and in the :manpage:`tcp` manpage. Each script sets some of these configuration variables. 310/10000 · 310
66 ../../exercises/tcp-2.rst:883

	English packetdrill_ requires root privileges since it inject raw IP packets. The easiest way to install it is to use a virtualbox image with a Linux kernel 4.x or 5.x. You can clone its git repository from https://github.com/google/packetdrill and follow the instructions in https://github.com/google/packetdrill/tree/master/gtests/net/packetdrill. The packetdrill_ scripts used in this section are available from https://github.com/cnp3/ebook/tree/master/exercises/packetdrill_scripts 478/10000 · 478
67 ../../exercises/tcp-2.rst:885

	English By default, packetdrill_ uses port 8080 when creating TCP segments. You can thus capture the packets injected by packetdrill_ and the responses from the stack by using ``tcpdump -i any -n port 8080`` 199/10000 · 199
68 ../../exercises/tcp-2.rst:887

	English The `Push` flag is one of the TCP flags defined in :rfc:`793`. TCP stacks usually set this flag when transmitting a segment that empties the send buffer. This is the reason why we observe this push flag in our example. 218/10000 · 218
69 ../../exercises/tcp-2.rst:889

	English The variables that are included in TCP_INFO are defined in https://github.com/torvalds/linux/blob/master/include/uapi/linux/tcp.h 129/10000 · 129
70 ../../exercises/tcp-2.rst:891

	English These states are defined in https://github.com/torvalds/linux/blob/master/include/net/tcp_states.h 98/10000 · 98
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