Exit Zen
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../../principles/transport.rst:31
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Alice : `What time is it ?`
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../../protocols/dns.rst:42
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The last four sections of the DNS message contain `Resource Records` (RR). All RRs have the same top level format shown in the figure below.
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../../bibliography.rst:39
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Calvert, K., Donahoo, M., `TCP/IP Sockets in Java : Practical Guide for Programmers <http://books.google.com/books?id=lfHo7uMk7r4C>`_, Morgan Kaufman, 2008
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../../glossary.rst:48
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ARPANET
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../../index.rst:164
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:ref:`search`
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../../exercises/ex-sharing.rst:231
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With CSMA, hosts need to listen to the communication channel before starting their transmission. Consider again a 2 kilometers long cable where hosts send frames at 100 Mbps. Show in the figure below the correct transmission of frames with CSMA.
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../../exercises/network.rst:99
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Is it possible to configure the link metrics so that the packets sent by the router located in `Los Angeles` to the routers located in respectively `New York` and `Washington` do not follow the same path ?
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../../exercises/reliability.rst:32
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Each frame contains `D` bytes of data and `c` bytes of control information
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../../exercises/sockets.rst:114
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The ``sendto`` system call allows to send data to a peer identified by its socket address through a given socket.
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../../exercises/transport.rst:105
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In the above example, the two `DATA` segments were lost before arriving at the destination. Discuss the following scenario and explain how the receiver should react to the reception of the last `DATA` segment.
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../../principles/naming.rst:73
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This grammar specifies that a host name is an ordered list of labels separated by the dot (`.`) character. Each label can contain letters, numbers and the hyphen character (`-`) [#fidn]_. Fully qualified domain names are read from left to right. The first label is a hostname or a domain name followed by the hierarchy of domains and ending with the root implicitly at the right. The top-level domain name must be one of the registered TLDs [#ftld]_. For example, in the above figure, `www.computer-networking.info` corresponds to a host named `www` inside the `computer-networking` domain that belongs to the `info` top-level domain.
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../../principles/network.rst:68
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To understand the key principles behind the operation of a network, let us analyze all the operations that need to be performed to allow host `A` in the above network to send one byte to host `B`. Thanks to the datalink layer used above the `A-R1` link, host `A` can easily send a byte to router `R1` inside a frame. However, upon reception of this frame, router `R1` needs to understand that this byte is destined to host `B` and not to itself. This is the objective of the network layer.
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../../principles/referencemodels.rst:40
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the Physical layer may deliver `fewer` bits to the receiver than the bits sent by the sender
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../../principles/reliability.rst:49
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Bits per second
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../../principles/transport.rst:32
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Bob : `11:55`
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../../protocols/dns.rst:48
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DNS Resource Records
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../../bibliography.rst:40
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Chiu, D., Jain, R., `Analysis of the Increase and Decrease Algorithms for Congestion Avoidance in Computer Networks <https://dx.doi.org/10.1016/0169-7552(89)90019-6>`_, Computer Networks and ISDN Systems Vol 17, pp 1-14, 1989
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../../glossary.rst:50
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The Advanced Research Project Agency (ARPA) Network is a network that was built by network scientists in USA with funding from the ARPA of the US Ministry of Defense. ARPANET is considered as the grandfather of today's Internet.
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../../exercises/ex-sharing.rst:260
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CSMA/CD does not use acknowledgments but instead assumes that each host can detect collisions by listening while transmitting. Consider a 2 kilometers long cable running at 10 Mbps. Show in the figure below the utilization of the communication channel and the collisions that would occur. For this exercise, do not attempt to retransmit the frames that have collided.
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../../exercises/network.rst:101
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Is it possible to configure the link weights so that the packets sent by the router located in `Los Angeles` to router located in `New York` follow one path while the packets sent by the router located in `New York` to the router located in `Los Angeles` follow a completely different path ?
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