cnp3-ebook - English @ Weblate

Exit Zen

196 ../../protocols/tcp.rst:653

	English In theory, a TCP implementation could store the timestamp of each data segment transmitted and compute a new estimate for the round-trip-time upon reception of the corresponding acknowledgment. However, using such frequent measurements introduces a lot of noise in practice and many implementations still measure the round-trip-time once per round-trip-time by recording the transmission time of one segment at a time :rfc:`2988` 429/10000 · 429
197 ../../glossary.rst:211

	English X.25 4/10000 · 4
197 ../../principles/reliability.rst:1044

	English Piggybacking example 20/10000 · 20
197 ../../protocols/email.rst:358

	English The SMTP responses are defined by the BNF shown in the figure below. 68/10000 · 68
197 ../../protocols/ipv6.rst:711

	English Assume that the LAN containing the two hosts and the router is assigned prefix ``2001:db8:1234:5678/64``. A first solution to configure the IPv6 addresses in this network is to assign them manually. A possible assignment is : 225/10000 · 225
197 ../../protocols/tcp.rst:655

	English Some security experts have raised concerns that using the real-time clock to set the `TSval` in the timestamp option can leak information such as the system's up-time. Solutions proposed to solve this problem may be found in [CNPI09]_ 234/10000 · 234
198 ../../glossary.rst:213

	English A wide area networking technology using virtual circuits that was deployed by telecommunication operators. 106/10000 · 106
198 ../../principles/reliability.rst:1052

	English SDU is the acronym of Service Data Unit. We use it as a generic term to represent the data that is transported by a protocol. 125/10000 · 125
198 ../../protocols/email.rst:363

	English BNF specification of the SMTP responses 39/10000 · 39
198 ../../protocols/ipv6.rst:713

	English ``2001:db8:1234:5678::1`` is assigned to ``router`` 51/10000 · 51
198 ../../protocols/tcp.rst:657

	English As a TCP client often establishes several parallel or successive connections with the same server, :rfc:`2140` has proposed to reuse for a new connection some information that was collected in the TCB of a previous connection, such as the measured rtt. However, this solution has not been widely implemented. 308/10000 · 308
199 ../../glossary.rst:199

	English X11 3/10000 · 3
199 ../../principles/reliability.rst:1054

	English The size of the sliding window can be either fixed for a given protocol or negotiated during the connection establishment phase. Some protocols allow to change the maximum window size during the data transfer. We will explain these techniques with real protocols later. 269/10000 · 269
199 ../../protocols/email.rst:366

	English SMTP servers use structured reply codes containing three digits and an optional comment. The first digit of the reply code indicates whether the command was successful or not. A reply code of `2xy` indicates that the command has been accepted. A reply code of `3xy` indicates that the command has been accepted, but additional information from the client is expected. A reply code of `4xy` indicates a transient negative reply. This means that for some reason, which is indicated by either the other digits or the comment, the command cannot be processed immediately, but there is some hope that the problem will only be transient. This is basically telling the client to try the same command again later. In contrast, a reply code of `5xy` indicates a permanent failure or error. In this case, it is useless for the client to retry the same command later. Other application layer protocols such as FTP :rfc:`959` or HTTP :rfc:`2616` use a similar structure for their reply codes. Additional details about the other reply codes may be found in :rfc:`5321`. 1057/10000 · 1057
199 ../../protocols/ipv6.rst:714

	English ``2001:db8:1234:5678::AA`` is assigned to ``hostA`` 51/10000 · 51
200 ../../glossary.rst:201

	English The XWindow system and the associated protocols are defined in [SG1990]_ 72/10000 · 72
200 ../../protocols/email.rst:368

	English Examples of SMTP reply codes include the following : 52/10000 · 52
200 ../../protocols/ipv6.rst:715

	English ``2001:db8:1234:5678::BB`` is assigned to ``hostB`` 51/10000 · 51
201 ../../glossary.rst:253

	English XML 3/10000 · 3
201 ../../protocols/email.rst:387

	English Reply code `220` is used by the server as the first message when it agrees to interact with the client. Reply code `221` is sent by the server before closing the underlying transport connection. Reply code `250` is the standard positive reply that indicates the success of the previous command. Reply code `354` indicates that the client can start transmitting its email message. Reply code `421` is returned when there is a problem (e.g. lack of memory/disk resources) that prevents the server from accepting the transport connection. Reply codes `450` and `452` indicate that the destination mailbox is temporarily unavailable, for various reasons, while reply code `550` indicates that the mailbox does not exist or cannot be used for policy reasons. The `500` to `503` reply codes correspond to errors in the commands sent by the client. The `503` reply code would be sent by the server when the client sends commands in an incorrect order (e.g. the client tries to send an email before providing the destination address of the message). 1043/10000 · 1043

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