cap0 introduccion

8/2/2019 cap0 introduccion

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Maestra en Gerencia de

Mdulo:Redes de Datos


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FacilitadorDiegoDiego AvilaAvila PesntezPesntezEstudios:Estudios:Ingeniero en Sistemas Informticos ( UC 1997)Ingeniero en Sistemas Informticos ( UC 1997)

Maestra enMaestra en InternetworkingInternetworking (U. de Chile 2002)(U. de Chile 2002)

Diplomado en Docencia Universitaria ( )Diplomado en Docencia Universitaria ( )Maestra en Informtica Aplicada (ESPOCHMaestra en Informtica Aplicada (ESPOCH

2004)2004)

Certificaciones Internacionales:Certificaciones Internacionales:CCNA (CiscoCCNA (Cisco CertifiedCertified NetwokNetwok AssocieteAssociete))

CCNP(CiscoCCNP(Cisco CertifiedCertified NetworkNetwork ProffesionalProffesional))

CCAI (CiscoCCAI (Cisco CertifiedCertified AuthirizedAuthirized Instructor)Instructor)


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Socializacin - Alumnos


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Expectativas


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Evaluacin del Mdulo

Trabajo Final 30% Tareas/Labs 30%

HorarioHorario dede jornadasjornadas::

ViernesViernes 18h0018h00 -- 22h0022h00SbadoSbado 08h0008h00 -- 16h0016h00


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Agenda Conceptos Generales, modelo OSI

& TCP/IP

Conectividad en funcin de

capas: Fsica, Enlace de datos, Red

Switching LAN: VLAN, STP

Direccionamiento IPv4, IPv6.

Servicios


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Objetivos del MduloRevisar la tecnologa actual del entorno de

redes LAN que permita a los asistentesrecordar definiciones y conceptos importantes

como punto de partida a los laboratorios

experimentales. Analizar los principios del Modelo de

referencia OSI, TCP/IP, switching Ethernet,

VLAN, STP, protocolos capa 3 que permitancomparar con las diferentes aplicaciones y su

funcionamiento estratificado en capas.


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Objetivos del MduloConocer el proceso de implantacin de VLAN

y su aplicacin en un ambiente corporativo conla utilizacin de simuladores de red (Packet

Tracer 5.3).


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Bibliografa Isaacs, M. Internet User's Guide to Network Resource Tools:

http://www.terena.nl/gnrt/. Estupenda gua sobre las herramientas y servicios de

Internet. Imprescindible para cualquier usuario habitual u ocasional.

McKeon, B.An Introduction to the OSI Reference Model:

http://ntrg.cs.tcd.ie/undergrad/4ba2/ . Muy buen resumen del modelo OSI y de los

protocolos OSI. Tambin habla de TCP/IP y ATM.

Networking Essentials: http://www.labmice.net/networking/networkbasics.htm

Technology Guides for Communications & Networking:

http://www.techguide.com/. Interesante recopilacin de guas tcnicas. Hay que

registrarse para conseguirlas, pero es gratis.

Home Page de Raj Jain: http://www.cis.ohio-state.edu/~jain/. Impresionantecoleccin de materiales docentes sobre redes (presentaciones, ejercicios, etc.)

Tutoriales de Network Magazine:

http://www.networkmagazine.com/static/tutorial/index.html. Interesante

recopilacin de artculos educativos sobre diversos temas relacionados con redes

de computadores.


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BibliografaHowe, D. Free On-Line Dictionary Of Computing: http://wombat.doc.ic.ac.uk/.

Recopilacin exhaustiva de trminos informticos.

Malkin, G. (RFC1983). Internet Users' Glossary. Completo diccionario detrminos y abreviaturas del mundo Internet

Tech Encyclopedia: http://www.techweb.com/encyclopedia/

Webopedia: http://webopedia.internet.com/

Whatis: http://whatis.com/

ANSI (American National Standards Institute): http://www.ansi.org/

ATM Forum: http://www.atmforum.com

Frame Relay Forum: http://www.frforum.com

IEEE (Institute of Electrical and Electronic Engineers): http://www.ieee.org

IETF (Internet Engineering Task Force): http://www.ietf.org


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Local Area Network (LAN)

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Local Area Network (LAN)

An individual network usually spans a singlegeographical area, providing services and applications

to people within a common organizational structure,

such as a single business, campus or region.


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Wide Area Network (WAN)

T1, DS3, OC3

PPP, HDLC

Frame Relay, ATM

ISDN, POTS

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Wide Area Networks (WANs)

Leased connections through a telecommunications

service provider network.

Networks that connect LANs in geographically

separated locations

Telecommunications service provider (Carrier)

interconnect the LANs at the different locations.

Voice and data on separate networks or convergednetworks


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End devices

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End devices or hosts:

The source or destination of a message.


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Components of the Network

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Devices (hardware)

End devices, switch, router, firewall

Media (wired, wireless)

Cables, wireless mediums

Services (software)

Network applications, routing protocols, processes, algorithms


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Servers and Clients

Client

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A host

Client, Server, or both.

Software determines the role.

Servers provide information and services to clients

e-mail or web pages

Clients request information from the server.


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NetworkMedia

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Network media: The medium over which the message

travels.Cooper wires - electrical impulses.

Fiber optics pulses of light

Wireless electromagnetic waves.


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Network

Media

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Different media considerations (4):

Distance it will carry signalEnvironment it works in

Bandwidth (speed)

Cost


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Protocol Suites and Standards

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Early days proprietary network equipment and protocols.

Now Industry standards

Institute of Electrical and Electronics Engineers (IEEE)

Examples: 802.3 (Ethernet), 802.11 (WLAN)

Internet Engineering Task Force (IETF)

Internet standards

RFCs (Request for Comments)

Example: TCP, IP, HTTP, FTP


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Example: RFC 791 IPv4

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Protocols

HTTP

Header DataProtocols

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Protocol Rules that govern communications.

Protocol suite - A group of inter-related protocols

Example: TCP/IP

Frame Header IP Header TCP Header App

Header Frame Trailer


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Protocol and Reference Models

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The Open Systems Interconnection (OSI) model is themost widely known internetwork reference model.

The International Organization for Standardization(ISO) released the OSIreference model in 1984, was the

descriptive scheme they created.


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TCP/IP Model

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TCP/IP Model and Protocol Suite is an open standard.


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Multiple protocols (encapsulated)

HTTP

Header DataProtocols

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Encapsulation Process of adding a header to the data

or any previous set of headers.

Decapsulation Process of removing a header.

Frame Header IP Header TCP Header App

Header Frame Trailer

Data


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The Communication Process - Encapsulation

Server

DataHTTPHeader

TCP

Header

IP

Header

Data Link

Header

Data Link

Trailer

HTTP Data

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Encapsulation Process of adding control information as

it passes down through the layered model.


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The Communication Process - Decapsulation

DataHTTPHeader

TCP

Header

IP

Header

Data Link

Header

Data Link

Trailer

Client

HTTP Data

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Decapsulation Process of removing control information

as it passes upwards through the layered model.


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The

CommunicationProcess

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Protocol Data Unit (PDU) - The form that a piece of data takes at anylayer.

PDUs are named according to the protocols of the TCP/IP suite.

Data - Application layer PDU

Segment - Transport Layer PDU

Packet - Internetwork Layer PDU

Frame - Network Access Layer PDU

Bits - A PDU used when physically transmitting data over the

medium


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TAREA EN CLASE: ENCAPSULAMIENTO

Organizarse en grupos de 8 personas.

Determinar la manera como pueden

describir el proceso de encapsulamiento

de datos.10 min. para planificar la presentacin.

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