Completo referencias de PPP.

[z.facultad/75.43/tp2.git] / Informe.lyx

diff --git a/Informe.lyx b/Informe.lyx
index 9b926715530d4969db95cdc3c131d56f943861ae..cf2e71ef1fdf4b18e9f0f7caf345ac8d45f23ba1 100644 (file)
--- a/Informe.lyx
+++ b/Informe.lyx
@@ -61,7 +61,7 @@ Protocolo PPP
 Introducción
 \layout Standard
 
 Introducción
 \layout Standard
 

-El protocolo PPP es muy utilizado para establecer una comunicación entre
+El protocolo PPP[1] es muy utilizado para establecer una comunicación entre

  2 redes (routers), ya sea entre LANs o entre una LAN y WAN u otras redes
  más grandes.
  Incluso es útil para comunicar un sólo host a una red distante (donde no
  2 redes (routers), ya sea entre LANs o entre una LAN y WAN u otras redes
  más grandes.
  Incluso es útil para comunicar un sólo host a una red distante (donde no


@@ -76,7 +76,7 @@ Protocolo
 
 \begin_inset Float figure
 wide false
 
 \begin_inset Float figure
 wide false

-collapsed true
+collapsed false

 
 \layout Caption
 
 
 \layout Caption
 


@@ -85,7 +85,7 @@ collapsed true
 
 \end_inset 
 
 
 \end_inset 
 

-Diagrama de estados de una conexión PPP
+Diagrama de estados de una conexión PPP[2]

 \layout Standard
 
 
 \layout Standard
 
 


@@ -167,15 +167,7 @@ El protocolo NCP es muy espec
  a la asignación de la IP (aunque puede negociar compresión de cabeceras
  también).
  Hay también extensiones, como la extensión para configurar servidores de
  a la asignación de la IP (aunque puede negociar compresión de cabeceras
  también).
  Hay también extensiones, como la extensión para configurar servidores de

- nombre (definido en la RFC 1877 
-\begin_inset Quotes eld
-\end_inset 
-
-PPP Internet Protocol Control Protocol Extensions for Name Server Addresses
-\begin_inset Quotes erd
-\end_inset 
-
-).
+ nombre[3].

 \layout Subsection
 
 Configuración de los routes sobre línea dedicada
 \layout Subsection
 
 Configuración de los routes sobre línea dedicada


@@ -185,7 +177,7 @@ Con modems
 \layout Standard
 
 Lo primero que hay que hacer si utilizamos un modem sobre una línea telefónica
 \layout Standard
 
 Lo primero que hay que hacer si utilizamos un modem sobre una línea telefónica

- conmutada, es establecer el canal de la capa física.
+ conmutada, es establecer el canal de la capa física[4].

  Esto significa que una de las puntas debe discar el número de la otra y
  establecer el canal utilizando algún programa de comunicación que permita
  salir sin 
  Esto significa que una de las puntas debe discar el número de la otra y
  establecer el canal utilizando algún programa de comunicación que permita
  salir sin 


@@ -370,7 +362,7 @@ Tablas de ruteo
 
 \begin_inset Float figure
 wide false
 
 \begin_inset Float figure
 wide false

-collapsed true
+collapsed false

 
 \layout Caption
 
 
 \layout Caption
 


@@ -9469,7 +9461,7 @@ Tablas de ruteo (simulaci
 
 \begin_inset Float figure
 wide false
 
 \begin_inset Float figure
 wide false

-collapsed true
+collapsed false

 
 \layout Caption
 
 
 \layout Caption
 


@@ -14816,8 +14808,6 @@ Caracter
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 Tecnología
 \end_inset 
 </cell>
 Tecnología
 \end_inset 
 </cell>


@@ -14826,8 +14816,6 @@ Tecnolog
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 MTU
 \end_inset 
 </cell>
 MTU
 \end_inset 
 </cell>


@@ -14836,8 +14824,6 @@ MTU
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 Cabeceras (máx-mín si aplica)
 \end_inset 
 </cell>
 Cabeceras (máx-mín si aplica)
 \end_inset 
 </cell>


@@ -14846,8 +14832,6 @@ Cabeceras (m
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 Máxima cantidad de host
 \end_inset 
 </cell>
 Máxima cantidad de host
 \end_inset 
 </cell>


@@ -14858,8 +14842,6 @@ M
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 PPP
 \end_inset 
 </cell>
 PPP
 \end_inset 
 </cell>


@@ -14868,8 +14850,6 @@ PPP
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 negociable
 \end_inset 
 </cell>
 negociable
 \end_inset 
 </cell>


@@ -14878,9 +14858,7 @@ negociable
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-7-10 Libro Tanembaum
+7-10 [5]

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -14888,8 +14866,6 @@ negociable
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 2
 \end_inset 
 </cell>
 2
 \end_inset 
 </cell>


@@ -14900,8 +14876,6 @@ negociable
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 X.25
 \end_inset 
 </cell>
 X.25
 \end_inset 
 </cell>


@@ -14910,8 +14884,6 @@ X.25
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 128
 \end_inset 
 </cell>
 128
 \end_inset 
 </cell>


@@ -14920,8 +14892,6 @@ X.25
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 3
 \end_inset 
 </cell>
 3
 \end_inset 
 </cell>


@@ -14939,8 +14909,6 @@ X.25
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 IEEE 802.3 (CSMA/CD)
 \end_inset 
 </cell>
 IEEE 802.3 (CSMA/CD)
 \end_inset 
 </cell>


@@ -14949,8 +14917,6 @@ IEEE 802.3 (CSMA/CD)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 1492
 \end_inset 
 </cell>
 1492
 \end_inset 
 </cell>


@@ -14959,8 +14925,6 @@ IEEE 802.3 (CSMA/CD)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 26
 \end_inset 
 </cell>
 26
 \end_inset 
 </cell>


@@ -14969,8 +14933,6 @@ IEEE 802.3 (CSMA/CD)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 100
 \end_inset 
 </cell>
 100
 \end_inset 
 </cell>


@@ -14981,8 +14943,6 @@ IEEE 802.3 (CSMA/CD)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 Ethernet (Fast y Giga inclusive)
 \end_inset 
 </cell>
 Ethernet (Fast y Giga inclusive)
 \end_inset 
 </cell>


@@ -14991,8 +14951,6 @@ Ethernet (Fast y Giga inclusive)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 1500
 \end_inset 
 </cell>
 1500
 \end_inset 
 </cell>


@@ -15001,9 +14959,7 @@ Ethernet (Fast y Giga inclusive)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-26 Libro T
+26 [6]

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -15011,9 +14967,8 @@ Ethernet (Fast y Giga inclusive)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-100 (por segmento de 100 metros)
+100 (p/seg.
+ de 100 metros)

 \end_inset 
 </cell>
 </row>
 \end_inset 
 </cell>
 </row>


@@ -15023,8 +14978,6 @@ Ethernet (Fast y Giga inclusive)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 FDDI
 \end_inset 
 </cell>
 FDDI
 \end_inset 
 </cell>


@@ -15033,8 +14986,6 @@ FDDI
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 4352
 \end_inset 
 </cell>
 4352
 \end_inset 
 </cell>


@@ -15043,9 +14994,7 @@ FDDI
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-18-48 http://www.protocols.com/pbook/lan.htm 
+18-48 [7] 

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -15053,9 +15002,6 @@ FDDI
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-Infinitas?

 \end_inset 
 </cell>
 </row>
 \end_inset 
 </cell>
 </row>


@@ -15065,8 +15011,6 @@ Infinitas?
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 Token Ring (16MB)
 \end_inset 
 </cell>
 Token Ring (16MB)
 \end_inset 
 </cell>


@@ -15075,8 +15019,6 @@ Token Ring (16MB)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 17914
 \end_inset 
 </cell>
 17914
 \end_inset 
 </cell>


@@ -15085,9 +15027,7 @@ Token Ring (16MB)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-21-51 http://www.protocols.com/pbook/lan.htm
+21-51 [8]

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -15095,9 +15035,6 @@ Token Ring (16MB)
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-infinitas?

 \end_inset 
 </cell>
 </row>
 \end_inset 
 </cell>
 </row>


@@ -15107,8 +15044,6 @@ infinitas?
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 802.11g
 \end_inset 
 </cell>
 802.11g
 \end_inset 
 </cell>


@@ -15117,8 +15052,6 @@ infinitas?
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 2312
 \end_inset 
 </cell>
 2312
 \end_inset 
 </cell>


@@ -15127,9 +15060,7 @@ infinitas?
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-34 Libro T
+34 [9]

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -15146,8 +15077,6 @@ infinitas?
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 Bluetooth
 \end_inset 
 </cell>
 Bluetooth
 \end_inset 
 </cell>


@@ -15156,8 +15085,6 @@ Bluetooth
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 343
 \end_inset 
 </cell>
 343
 \end_inset 
 </cell>


@@ -15166,9 +15093,7 @@ Bluetooth
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-126 (bits) Libro T
+126 (bits) [10]

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -15185,8 +15110,6 @@ Bluetooth
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 802.16
 \end_inset 
 </cell>
 802.16
 \end_inset 
 </cell>


@@ -15195,8 +15118,6 @@ Bluetooth
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 

 1996
 \end_inset 
 </cell>
 1996
 \end_inset 
 </cell>


@@ -15205,9 +15126,7 @@ Bluetooth
 
 \layout Standard
 
 
 \layout Standard
 

-
-\size scriptsize 
-52 (bits) Libro T
+52 (bits) [11]

 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
 \end_inset 
 </cell>
 <cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">


@@ -15229,6 +15148,21 @@ Suponemos que el MTU de los PPP negociados es el m
  las redes adyacentes a cada router participante del enlace PPP.
 \layout Subsection
 
  las redes adyacentes a cada router participante del enlace PPP.
 \layout Subsection
 

+Paquetes de red
+\layout Standard
+
+No se realizó este punto, según lo indicado en la práctica.
+\layout Subsection
+
+Cálculo de eficiencia
+\layout Standard
+
+No se realizó este punto, según lo indicado en la práctica.
+\layout Subsection
+
+Cálculo de fragmentación por distintos caminos
+\layout Subsubsection
+

 HTTP
 \layout Standard
 
 HTTP
 \layout Standard
 


@@ -15237,10 +15171,10 @@ Calculamos la fragmentaci
 request
 \emph default 
  HTTP del host al servidor web como su respuesta de 100KiB.
 request
 \emph default 
  HTTP del host al servidor web como su respuesta de 100KiB.

-\layout Subsubsection
+\layout Paragraph

 
 Token Ring del webserver (alf) - Ethernet (seinfeld)
 
 Token Ring del webserver (alf) - Ethernet (seinfeld)

-\layout Paragraph
+\layout Subparagraph

 
 Request HTTP
 \layout Standard
 
 Request HTTP
 \layout Standard


@@ -15537,7 +15471,7 @@ webserver
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Paragraph
+\layout Subparagraph

 
 Response HTTP
 \layout Standard
 
 Response HTTP
 \layout Standard


@@ -15870,14 +15804,14 @@ host
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Subsubsection
+\layout Paragraph

 
 Token Ring del webserver (alf) - Token Ring (simpsons)
 \layout Standard
 
 Se omitirán las explicaciones detalladas de los cálculos realizados en el
  punto anterior.
 
 Token Ring del webserver (alf) - Token Ring (simpsons)
 \layout Standard
 
 Se omitirán las explicaciones detalladas de los cálculos realizados en el
  punto anterior.

-\layout Paragraph
+\layout Subparagraph

 
 Request HTTP
 \layout Standard
 
 Request HTTP
 \layout Standard


@@ -16333,7 +16267,7 @@ webserver
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Paragraph
+\layout Subparagraph

 
 Response HTTP
 \layout Standard
 
 Response HTTP
 \layout Standard


@@ -16819,10 +16753,10 @@ host
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Subsubsection
+\layout Paragraph

 
 Token Ring del webserver (alf) - FDDI (heman)
 
 Token Ring del webserver (alf) - FDDI (heman)

-\layout Paragraph
+\layout Subparagraph

 
 Request HTTP
 \layout Standard
 
 Request HTTP
 \layout Standard


@@ -17138,7 +17072,7 @@ webserver
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Paragraph
+\layout Subparagraph

 
 Response HTTP
 \layout Standard
 
 Response HTTP
 \layout Standard


@@ -17456,10 +17390,10 @@ host
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Subsubsection
+\layout Paragraph

 
 Token Ring del webserver (alf) - Bluetooth (csi)
 
 Token Ring del webserver (alf) - Bluetooth (csi)

-\layout Paragraph
+\layout Subparagraph

 
 Request HTTP
 \layout Standard
 
 Request HTTP
 \layout Standard


@@ -17648,7 +17582,7 @@ webserver
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Paragraph
+\layout Subparagraph

 
 Response HTTP
 \layout Standard
 
 Response HTTP
 \layout Standard


@@ -17850,10 +17784,10 @@ host
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Subsubsection
+\layout Paragraph

 
 Token Ring del webserver (alf) - 802.11g (friends)
 
 Token Ring del webserver (alf) - 802.11g (friends)

-\layout Paragraph
+\layout Subparagraph

 
 Request HTTP
 \layout Standard
 
 Request HTTP
 \layout Standard


@@ -18042,7 +17976,7 @@ webserver
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Paragraph
+\layout Subparagraph

 
 Response HTTP
 \layout Standard
 
 Response HTTP
 \layout Standard


@@ -18244,25 +18178,847 @@ host
 \end_inset 
 
 
 \end_inset 
 
 

-\layout Subsubsection
+\layout Paragraph

 
 Token Ring del webserver (alf) - 802.16 (internet B)
 
 Token Ring del webserver (alf) - 802.16 (internet B)

-\layout Comment
+\layout Subparagraph

 
 

-Falta completo
-\layout Subsection
+Request HTTP
+\layout Standard

 
 

-FTP
+Camino:

 \layout Standard
 
 \layout Standard
 

-El análisis de tráfico FTP va a ser muy similar al HTTP, con la diferencia
- de que probablemente los comandos FTP sean tan pequeños que no sufran fragmenta
-ción alguna, mientras que la transferencia de datos sí.
-\layout Subsection
+host -> 802.16 -> H114 -> Gigabit Ethernet -> H118 -> PPP (MTU: 1500) ->
+ H131 -> FDDI -> H132 -> Token Ring -> Webserver
+\layout Standard

 
 

-Telnet
+El MTU de 802.16 es de 1996, pero descontando las cabeceras IP + TCP quedarían
+ 1944 bytes efectivos.
+ Por lo tanto se fragmenta en 53 frames:
+\layout LyX-Code
+
+802.16: | 1944 | ...
+ x52 | 1312 |

 \layout Standard
 
 \layout Standard
 

-Telnet va a comportarse de manera muy similar a los comandos FTP, ya que
- son paquetes muy pequeños, seguramente nunca van a ser necesario fragmentarlos.
+Pero H114 debe volver a fragmentar para que quepan en la Gigabit Ethernet,
+ resultando 105 frames:
+\layout LyX-Code
+
+802.16: | 1944       | ...
+ x52 | 1312 |
+\layout LyX-Code
+
+Gb ETH: | 1440 | 504 | ...
+ x52 | 1312 |
+\layout Standard
+
+A partir de ahora, no es necesario fragmentar más a estos frames, ya que
+ todos los MTU utilizados en el resto de la transmisión son mayores que
+ el de la Gigabit Ethernet.
+ Por lo tanto sólo resta que el webserver reensamble los frames.
+\layout Standard
+
+
+\begin_inset  Tabular
+<lyxtabular version="3" rows="6" columns="6">
+<features>
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" rightline="true" width="0">
+<row topline="true" bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Tecnología
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Origen
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Destino
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Fragmentos
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Fragmenta
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Reensabla
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+802.16
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+host
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H114
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+53
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+host
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Gigabit Ethernet
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H114
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H118
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+105
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H114
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+PPP (MTU 1500)
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H118
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H131
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+105
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+FDDI
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H131
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H132
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+105
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true" bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Token Ring
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H132
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+webserver
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+105
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+webserver
+\end_inset 
+</cell>
+</row>
+</lyxtabular>
+
+\end_inset 
+
+
+\layout Subparagraph
+
+Response HTTP
+\layout Standard
+
+Camino:
+\layout Standard
+
+Webserver -> Token Ring -> H132 -> FDDI -> H131 -> PPP (1500) -> H118 ->
+ Gigabit Ethernet -> H114 -> 802.16 -> host 
+\layout Standard
+
+Del webserver salen (por la fragmentación) 6 frames:
+\layout LyX-Code
+
+TOKEN: | 17862 | ...
+ x5 | 13090 |
+\layout Standard
+
+Ahora el router H132 debe fragmentar para poder enviarlos por la red FDDI.
+ Pasamos de tener 6 frames Token Ring a tener 29 FDDI:
+\layout LyX-Code
+
+TOKEN: | 17862               | ...
+ x5 | 13090               |
+\layout LyX-Code
+
+FDDI:  | 4300 | ...
+ x4 | 662 | ...
+ x5 | 4300 | ...
+ x3 | 190 |
+\layout Standard
+
+Ahora el router H131 toma estos nuevos frames y debe volver a fragmentarlos
+ para poder enviarlos por PPP (que como dijimos tiene un MTU de 1500).
+ Cada fragmento de 4300 bytes de payload se convierte en 3 fragmentos; el
+ resto no necesita ser fragmentado.
+ Por lo tanto tenemos 75 fragmentos PPP:
+\layout LyX-Code
+
+FDDI: | 4300               | ...
+ x23 | 662 | ...
+ x5 | 190 |
+\layout LyX-Code
+
+PPP:  | 1448 | 1448 | 1404 | ...
+ x23 | 662 | ...
+ x5 | 190 |
+\layout Standard
+
+A partir de ahora, no es necesario fragmentar más a estos frames, ya que
+ todos los MTU utilizados en el resto de la transmisión son mayores que
+ el del enlace PPP.
+ Por lo tanto sólo resta que el host reensamble los frames.
+\layout Standard
+
+
+\begin_inset  Tabular
+<lyxtabular version="3" rows="6" columns="6">
+<features>
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" width="0">
+<column alignment="center" valignment="top" leftline="true" rightline="true" width="0">
+<row topline="true" bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Tecnología
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Origen
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Destino
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Fragmentos
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Fragmenta
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Reensabla
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Token Ring
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+webserver
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H132
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+6
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+webserver
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+FDDI
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H132
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H131
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+29
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H132
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+PPP (MTU 1500)
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H131
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H118
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+75
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H131
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+Gigabit Ethernet
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H118
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H114
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+75
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+</row>
+<row topline="true" bottomline="true">
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+802.16
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+H114
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+host
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+75
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+-
+\end_inset 
+</cell>
+<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
+\begin_inset Text
+
+\layout Standard
+
+host
+\end_inset 
+</cell>
+</row>
+</lyxtabular>
+
+\end_inset 
+
+
+\layout Subsubsection
+
+FTP
+\layout Standard
+
+El análisis de tráfico FTP va a ser muy similar al HTTP, con la diferencia
+ de que probablemente los comandos FTP sean tan pequeños que no sufran fragmenta
+ción alguna, mientras que la transferencia de datos sí.
+\layout Subsubsection
+
+Telnet
+\layout Standard
+
+Telnet va a comportarse de manera muy similar a los comandos FTP, ya que
+ son paquetes muy pequeños, seguramente nunca van a ser necesario fragmentarlos.
+\layout Section
+
+Referencias
+\layout Standard
+
+[1] RFC 1661 
+\begin_inset Quotes eld
+\end_inset 
+
+The Point-to-Point Protocol (PPP)
+\begin_inset Quotes erd
+\end_inset 
+
+ (http://www.faqs.org/rfcs/rfc1661.html)
+\layout Standard
+
+[2] Tanenbaum Andrew S., : 
+\begin_inset Quotes eld
+\end_inset 
+
+Computers Networks
+\begin_inset Quotes erd
+\end_inset 
+
+, Prentice Hall, Marzo 17, 2003, cap 3, pag 190
+\layout Standard
+
+[3] RFC 1877 
+\begin_inset Quotes eld
+\end_inset 
+
+PPP Internet Protocol Control Protocol Extensions for Name Server Addresses
+\begin_inset Quotes erd
+\end_inset 
+
+ (http://www.faqs.org/rfcs/rfc1877.html)
+\layout Standard
+
+[4] Linux PPP Howto (http://www.tldp.org/HOWTO/PPP-HOWTO/)
+\layout Standard
+
+[5] Tanenbaum Andrew S., : 
+\begin_inset Quotes eld
+\end_inset 
+
+Computers Networks
+\begin_inset Quotes erd
+\end_inset 
+
+, Prentice Hall, Marzo 17, 2003, cap 3, pag 189
+\layout Standard
+
+[6] Tanenbaum Andrew S., : 
+\begin_inset Quotes eld
+\end_inset 
+
+Computers Networks
+\begin_inset Quotes erd
+\end_inset 
+
+, Prentice Hall, Marzo 17, 2003, cap 4, pag 218
+\layout Standard
+
+[7] http://www.protocols.com/pbook/lan.htm
+\layout Standard
+
+[8] http://www.protocols.com/pbook/lan.htm
+\layout Standard
+
+[9] Tanenbaum Andrew S., : 
+\begin_inset Quotes eld
+\end_inset 
+
+Computers Networks
+\begin_inset Quotes erd
+\end_inset 
+
+, Prentice Hall, Marzo 17, 2003, cap 4, pag 234
+\layout Standard
+
+[10] Tanenbaum Andrew S., : 
+\begin_inset Quotes eld
+\end_inset 
+
+Computers Networks
+\begin_inset Quotes erd
+\end_inset 
+
+, Prentice Hall, Marzo 17, 2003, cap 4, pag 246
+\layout Standard
+
+[11] Tanenbaum Andrew S., : 
+\begin_inset Quotes eld
+\end_inset 
+
+Computers Networks
+\begin_inset Quotes erd
+\end_inset 
+
+, Prentice Hall, Marzo 17, 2003, cap 4, pag 240

 \the_end
 \the_end