Exit Zen
14
../../protocols/http.rst:58
English
The first components of the `world wide web` are the Uniform Resource Identifiers (URI), defined in :rfc:`3986`. A URI is a character string that unambiguously identifies a resource on the world wide web. Here is a subset of the BNF for URIs ::
0/2440 · 244
14
../../protocols/ipv6.rst:90
English
PIP proposed in :rfc:`1621`
0/270 · 27
14
../../protocols/ppp.rst:35
English
`LAPB <http://en.wikipedia.org/wiki/LAPB>`_ and `HDLC <http://en.wikipedia.org/wiki/HDLC>`_ were widely used datalink layer protocols.
0/1340 · 134
14
../../protocols/routing.rst:46
English
The RIP message format
27/220 · 22
14
../../protocols/rpc.rst:36
English
For basic data types, :rfc:`1832` simply maps their representation into a sequence of bytes. For example a 32 bits integer is transmitted as follows (with the most significant byte first, which corresponds to big-endian encoding).
0/2300 · 230
14
../../protocols/ssh.rst:121
English
This negotiation of the cryptographic algorithms allows the implementations to evolve when new algorithms are proposed. If a client is upgraded, it can announce a new algorithm as its preferred one even if the server is not yet upgraded.
0/2370 · 237
14
../../protocols/tcp.rst:39
English
the address of the client
0/250 · 25
14
../../protocols/tls.rst:44
English
993
0/100 · 3
14
../../protocols/transport-service.rst:49
English
It is sometimes necessary to write IPv6 addresses in text format, e.g. when manually configuring addresses or for documentation purposes. The preferred format for writing IPv6 addresses is `x:x:x:x:x:x:x:x`, where the `x` 's are hexadecimal digits representing the eight 16-bit parts of the address. Here are a few examples of IPv6 addresses :
0/3430 · 343
14
../../protocols/udp.rst:56
English
a 16 bits checksum
0/180 · 18
14
../../protocols/wifi.rst:22
English
2 Mbps
0/100 · 6
15
../../bibliography.rst:51
English
Cohen, D., `On Holy Wars and a Plea for Peace`, IEN 137, April 1980, http://www.ietf.org/rfc/ien/ien137.txt
0/1070 · 107
15
../../glossary.rst:14
English
The American Standard Code for Information Interchange (ASCII) is a character-encoding scheme that defines a binary representation for characters. The ASCII table contains both printable characters and control characters. ASCII characters were encoded in 7 bits and only contained the characters required to write text in English. Other character sets such as Unicode have been developed later to support all written languages.
0/4270 · 427
15
../../exercises/ex-sharing.rst:316
English
An important part of the CSMA/CD algorithm is the exponential backoff. To illustrate the operation of this algorithm, let us consider a cable that has a length of one kilometer. The bandwidth of the network is set to 10 Mbps. Assume that when a collision occurs, host A always selects the highest possible random delay according to the exponential backoff algorithm while host B always selects the shortest one. In this network, the slot time is equal to the time required to transmit 100 bits. We further assume that a host can detect collision immediately (i.e. as soon as the other frame arrives).
0/6000 · 600
15
../../exercises/reliability.rst:35
English
The delay between the two hosts is `s` seconds in both directions
64/650 · 65
15
../../exercises/sockets.rst:135
English
As the ``sendto`` function is generic, this function will work correctly independently from the fact that the peer's address is defined as a path on the computer filesystem or a network address.
231/1940 · 194
15
../../exercises/transport.rst:128
English
Amazon provides the `S3 storage service <https://s3.amazonaws.com/>`_ 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 ?
493/4570 · 457
15
../../principles/referencemodels.rst:58
English
An important point to note about the `Datalink layer` is that although the figure below indicates that two entities of the `Datalink layer` exchange frames directly, in reality this is slightly different. When the `Datalink layer` entity on the left needs to transmit a frame, it issues as many `Data.request` primitives to the underlying `physical layer` as there are bits in the frame. The physical layer will then convert the sequence of bits in an electromagnetic or optical signal that will be sent over the physical medium. The `physical layer` on the right hand side of the figure will decode the received signal, recover the bits and issue the corresponding `Data.indication` primitives to its `Datalink layer` entity. If there are no transmission errors, this entity will receive the frame sent earlier.
829/8120 · 812
15
../../principles/network.rst:76
English
There are two possible organizations for the network layer :
59/600 · 60
15
../../principles/reliability.rst:52
English
1 Mbps
6/100 · 6