Exit Zen
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../../protocols/bgp.rst:352
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How to prefer a cheap link over an more expensive one ?
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../../protocols/email.rst:242
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F
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../../protocols/ethernet.rst:358
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2000
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../../protocols/ipv6.rst:338
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`Hop Limit` : this 8-bit field indicates the number of routers that can forward the packet. It is decremented by one by each router and prevents packets from looping forever inside the network.
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../../protocols/ethernet.rst:334
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the `identifier` of the root switch (`R`)
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../../protocols/tcp.rst:264
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the `maximum segment size` (MSS)
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../../protocols/tls.rst:510
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The server sends a CertificatRequest message. The client returns its certificate and signs the Handshake with is private key. This confirms to the server that the client owns the public key indicated in its certificate.
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../../glossary.rst:105
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ISN
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../../principles/network.rst:369 • ../../principles/network.rst:410 • ../../principles/network.rst:420 • ../../principles/network.rst:430 • ../../principles/network.rst:440
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index
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../../principles/reliability.rst:308
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The datalink layer is designed to send and receive frames on behalf of a user. We model these interactions by using the `DATA.req` and `DATA.ind` primitives. However, to simplify the presentation and to avoid confusion between a `DATA.req` primitive issued by the user of the datalink layer entity, and a `DATA.req` issued by the datalink layer entity itself, we will use the following terminology :
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../../principles/security.rst:955
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Alice computes :math:`S_{A}=B^{a} \mod p= 21^{8} \mod 23=3`
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../../exercises/ipv6.rst:827
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Starting from the :download:`/exercises/ipmininet_scripts/static-1.py` IPMininet_ script, we can explore classical problems when networks are configured with static routes. A first problem is when a router has an incomplete forwarding table. We configure the static routes as shown below. The entire script is available from :download:`/exercises/ipmininet_scripts/static-1-hole.py`.
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../../exercises/routing-protocols.rst:1327
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What is the path that packets follow from a host attached to ``AS1`` to a host attached to ``AS8`` ?
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../../protocols/bgp.rst:354
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`AS1` can install the following import filter on `R1` to ensure that it always sends packets via `R2` when it has learned a route via `AS2` and another via `AS4`.
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../../protocols/email.rst:242
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22
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../../protocols/ethernet.rst:359
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100 Gbps
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../../protocols/ipv6.rst:341
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It is interesting to note that there is no checksum inside the IPv6 header. This is mainly because all datalink layers and transport protocols include a checksum or a CRC to protect their frames/segments against transmission errors. Adding a checksum in the IPv6 header would have forced each router to recompute the checksum of all packets, with limited benefit in detecting errors. In practice, an IP checksum allows for catching errors that occur inside routers (e.g. due to memory corruption) before the packet reaches its destination. However, this benefit was found to be too small given the reliability of current memories and the cost of computing the checksum on each router [#fipv4checksum]_.
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../../protocols/ethernet.rst:335
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the `cost` of the shortest path between the switch that sent the `BPDU` and the root switch (`c`)
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../../protocols/tcp.rst:265
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`snd.nxt` : the sequence number of the next byte in the byte stream (the first byte of a new data segment that you send uses this sequence number)
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../../protocols/tls.rst:512
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There are many more differences between TLS 1.2 and TLS 1.3. Additional details may be found in their respective specifications, :rfc:`5246` and :rfc:`8446`.
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