Exit Zen
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../../exercises/reliability.rst:36
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there are no transmission errors
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../../exercises/sockets.rst:139
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Receiving data from a peer using a socket
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../../exercises/transport.rst:135
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Discussion questions
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../../principles/naming.rst:82
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This hierarchical naming scheme is a key component of the Domain Name System (DNS). The DNS is a distributed database that contains mappings between fully qualified domain names and addresses. The DNS uses the client-server model. The clients are hosts or applications that need to retrieve the mapping for a given name. Each :term:`nameserver` stores part of the distributed database and answers the queries sent by clients. There is at least one :term:`nameserver` that is responsible for each domain. In the figure below, domains are represented by circles and there are three hosts inside domain `dom` (`h1`, `h2` and `h3`) and three hosts inside domain `a.sdom1.dom`. As shown in the figure below, a sub-domain may contain both host names and sub-domains.
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../../principles/network.rst:78
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`datagram`
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../../principles/referencemodels.rst:69
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The Network layer
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../../principles/reliability.rst:52
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:math:`10^6`
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../../principles/sharing.rst:64
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In all these networks, except the full-mesh, the link bandwidth is shared among all connected hosts. Various algorithms have been proposed and are used to efficiently share the access to this resource. We explain several of them in the Medium Access Control section below.
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../../principles/transport.rst:43 • ../../principles/transport.rst:49
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Bob : `What is the secret password ?`
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../../bibliography.rst:62
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Davik, F. Yilmaz, M. Gjessing, S. Uzun, N., `IEEE 802.17 resilient packet ring tutorial <https://dx.doi.org/10.1109/MCOM.2004.1273782>`_, IEEE Communications Magazine, Mar 2004, Vol 42, N 3, p. 112-118
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../../glossary.rst:101
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The Abstract Syntax Notation One (ASN.1) was designed by ISO and ITU-T. It is a standard and flexible notation that can be used to describe data structures for representing, encoding, transmitting, and decoding data between applications. It was designed to be used in the Presentation layer of the OSI reference model but is now used in other protocols such as :term:`SNMP`.
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../../exercises/ex-sharing.rst:345
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Consider the network below. Compute the max-min fair allocation for the hosts in this network assuming that nodes `Sx` always send traffic towards node `Dx`. Furthermore, link `R1-R2` has a bandwidth of 10 Mbps while link `R2-R3` has a bandwidth of 20 Mbps.
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../../exercises/network.rst:132 • ../../exercises/network.rst:154 • ../../exercises/network.rst:184 • ../../exercises/network.rst:216
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Consider the network shown in the figure below.
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../../exercises/transport.rst:137
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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 ?
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../../principles/naming.rst:107
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A :term:`nameserver` that is responsible for domain `dom` can directly answer the following queries :
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../../principles/network.rst:79
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`virtual circuits`
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../../principles/referencemodels.rst:73
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The `Datalink layer` allows directly connected hosts to exchange information, but it is often necessary to exchange information between hosts that are not attached to the same physical medium. This is the task of the `network layer`. The `network layer` is built above the `datalink layer`. Network layer entities exchange `packets`. A `packet` is a finite sequence of bytes that is transported by the datalink layer inside one or more frames. A packet usually contains information about its origin and its destination, and usually passes through several intermediate devices called routers on its way from its origin to its destination.
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../../principles/reliability.rst:53
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1 Gbps
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../../principles/sharing.rst:66
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Fairness in computer networks
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../../principles/transport.rst:44
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Trudy : `1234`
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