Resumen ICND1

8/10/2019 Resumen ICND1

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Certificaciones CCENT y CCNA Routing & Switching:

Tipos de pregunta del examen CCNA (ICND1 e ICND2):

Multiple-choice (MC) single answer

Multiple-choice (MC) multiple answer Testlet

Drag-and-drop (DND)

Simulated lab (Sim)

Simlet

www.cisco.combuscarexam tutorial.

Lunes: Networking Basic: Enfoque al Funcionamiento de redes IP:


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Recognize the purpose and functions of various network devices such as Routers,

Switches, Bridges and Hubs.

Select the components required to meet a given network specification.

Identify common applications and their impact on the network

Describe the purpose and basic operation of the protocols in the OSI and TCP/IP

models.

Los 5 pasos de la encapsulacin de los datos: TCP/IP

Step 1. Create and encapsulate the application data with any require d application layer

headers. For example, the HTTP OK message can be returned in an HTTP header, followed

by part of the contents of a web page.

Step 2.Encapsulate the data supplied by the application layer inside a transport layer header.

For end-user applications, a TCP or UDP header is typically used.


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Step 3.Encapsulate the data supplied by the transport layer inside a networklayer (IP)

header. IP defines the IP addresses that uniquely identify each computer.

Step 4. Encapsulate the data supplie d by the ne twork laye r inside a data link layer header

and trailer. This layer uses both a header and a trailer.

Step 5.Transmit the bits.The physical layer encodes a signal onto the medium to transmit the

frame.

Identify the appropriate media, cables, ports, and connectors to connect Cisco

network devices to other network devices and hosts in a LAN.


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Clasificacin de dispositivos segn capas del modelo OSI:


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Resumen de los beneficios de trabajar bajo modelos:

Less complex.

Standard interfaces.

Easier to learn.

Easier to develop.

Multivendor interoperability.

Modular engineering.

Encapsulation Terminology

c

OSI Encapsulation and Protocol Data Units

Encapsulation and Databased TCP/IP


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Fundamentals of LAN

Ethernet

A series of LAN standards defined by the IEEE, originally invented by Xerox Corporation and

developed jointly by Xerox, Intel, and Digital Equipment Corporation.

Typical Small Ethernet-Only SOHO LAN

Single -Building Enterprise Wired and Wireless LAN


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Examples of Types of Ethernet Examples of Types of Ethernet

Crossover cable : If the endpoints transmit on the same pin pair

Straight-through cable : If the endpoints transmit on different pin pairs


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Ethernet Data Link Protocols

Commonly Used Ethernet Frame Format

Field of the frame:


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Use of Ethernet Type Field

LAN Switching Concepts

Bridge Create s Two Collision Domains and Two Shared Ethernets


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Switch Creates Four Collision Domains and Four Ethernet Segments

Sample Switch Forwarding and Filtering Decision


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Network with Redundant Links but Without STP: The Frame Loops Forever

Switch Internal Processing


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Fundamentals of WANs

Leased Lines

Ethernet as a Wan Technology

Accessing the Internet

Positioning Leased Lines with LANs and Routers

Small Enterprise Network with One Leased Line

Encapsulacin PPP y HDLC


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Etherne t as a WAN Technology

Fiber Ethernet Link to Connect a CPE Router to a Service Providers WAN

EoMPLS Acting Like a Simple Ethernet Link Between Two Routers

MPLS: Multiprotocol Label Switching

EoMPLS: Ethernet emulation and Ethernet over MPLS


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Design Choices in Ethernet LANs

Collision Domains, Broadcast Domains and VLANs

Collision Domains

Corresponde a un segmento fsico de una red, donde las tramas pueden producir una

colisin.

Broadcast Domains

Corresponde a un rea lgica que abarca un mensaje de tipo broadcast enviado por un

dispositivo.


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Virtual LANs (VLAN)

Campus LAN with Design Terminology Listed

Access:Provides a connection point (access) for end-user devices. Does not forward

frames between two other access switches under normal circumstances.

Distribution:Provides an aggregation point for access switches, forwarding frames

between switches, but not connecting directly to end-user devices.

Core:Aggregates distribution switches in very large campus LANs, providing very

high forwarding rates.


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Speed:Use your slowest supported speed (often 10 Mbps).

Duplex:If your speed = 10 or 100, use half-duplex; otherwise, use full-duplex.


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LAN Switching Technologies

Cisco Catalyst enterprise-class switches

Console Connection to a Switch

CLI Password Configuration: Console and Telnet


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Key Sequence s for Command Edit and Recall

CLI Configuration Mode Versus EXEC Modes

Cisco Switch Memory Types


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Configuring Ethernet Switching

IP Routing Technologies: Configure SVI interfaces

Network Device Security:

Device password security

Enable secret vs enable password

SSH

VTYs

Service password

Describe external authentication method

Configure and verify Switch Port SecuritSticky MAC

MAC address limitation

Static / dynamic

Violation modes

Err disable

Shutdown

Protect restrict

Shutdown unused ports

Err-disable recovery

Assign unused ports to an unused VLAN


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Basic Authentication Process with an External AAA Server.

Banners and Their Use:

Banner motd: SW(CONFIG)#banner motd #MENSAJE

Banner login: SW(CONFIG)#banner login #MENSAJE

Banner exec: SW(CONFIG)#banner exec #MENSAJE


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LAN Switch Configuration and Operation

IP for remote access

Interface configuration (including speed and duplex)

Port security

Securing unused switch interfaces

Switch Virtual Interface (SVI) Concept Inside a Switch

Emma# configure terminal

Emma(config)# interface vlan 1

Emma(config-if)# ip address 192.168.1.8 255.255.255.0

Emma(config-if)# no shutdown

00:25:07: %LINK-3-UPDOWN: Interface Vlan1, changed state to up

00:25:08: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1,changed

state to up

Emma(config-if)# exit

Emma(config)# ip default-gateway 192.168.1.1


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Determine the technology and media access control method for Ethernet networks

Identify basic switching concepts and the operation of Cisco switches.

Collision Domains

Broadcast Domains

Types of switching

CAM Table

Configure and verify initial switch configuration including remote access

management.

Cisco IOS commands to perform basic switch setup

Verify network status and switch operation using basic utilities such as ping, telnetand ssh.

Describe how VLANs create logically separate networks and the need for routing

between them.

Explain network segmentation and basic traffic management concepts

Configure and verify VLANs

Configure and verify trunking on Cisco switches

DTP

Auto negotiation

Martes:

- Direccionamiento IP (Ipv4/Ipv6).

- Tecnologas de enrutamiento IP.


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Miercoles:

- Servicios IP

- Dispositivos de seguridad de red

Jueves:

- Troubleshooting

- Preguntas de OSPF

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