Exit Zen
16
../../exercises/sockets.rst:139
English
Receiving data from a peer using a socket
53/410 · 41
16
../../exercises/transport.rst:135
English
Discussion questions
23/200 · 20
16
../../principles/naming.rst:82
English
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.
886/7600 · 760
16
../../principles/referencemodels.rst:69
English
The Network layer
16/170 · 17
16
../../principles/network.rst:78
English
`datagram`
14/100 · 10
16
../../principles/reliability.rst:52
English
:math:`10^6`
12/120 · 12
17
../../exercises/network.rst:132 • ../../exercises/network.rst:154 • ../../exercises/network.rst:184 • ../../exercises/network.rst:216
English
Consider the network shown in the figure below.
58/470 · 47
17
../../exercises/transport.rst:137
English
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 ?
172/1580 · 158
17
../../principles/naming.rst:107
English
A :term:`nameserver` that is responsible for domain `dom` can directly answer the following queries :
109/1010 · 101
17
../../principles/referencemodels.rst:73
English
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.
734/6370 · 637
17
../../principles/network.rst:79
English
`virtual circuits`
23/180 · 18
17
../../principles/reliability.rst:53
English
1 Gbps
6/100 · 6
17
../../principles/transport.rst:44
English
Trudy : `1234`
14/140 · 14
17
../../protocols/dns.rst:61
English
Query for the `AAAA` record of `www.ietf.org`
54/450 · 45
18
../../exercises/reliability.rst:40
English
when there are no losses
37/240 · 24
18
../../exercises/network.rst:152
English
Assuming that the network uses source routing, what are the possible paths from `R1` to `R4` ?
104/940 · 94
18
../../exercises/sockets.rst:144
English
The following program binds its socket to a given socket address and then waits for receiving new bytes, using the already created socket ``sock``.
159/1470 · 147
18
../../exercises/transport.rst:139
English
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 ?
181/2020 · 202
18
../../principles/naming.rst:109
English
the address of any host residing directly inside domain `dom` (e.g. `h2.dom` in the figure above)
113/970 · 97
18
../../principles/network.rst:83
English
The datagram organization
25/250 · 25