day1 1 basic network

8/17/2019 Day1 1 Basic Network

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DAY 1-1:BASIC NETWORK


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Building a Simple Network

Intoduce CiscoRouters And Switchs


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What Is a Network?


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Common Physical Components of aNetwork


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LAN


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WAN


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The Internet


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A router needs to do the following:

Know the destination address.

Identify the sources from which the router can learn.

Discover possible routes to the intended destination.

Select the best route.

Maintain and verify routing information.

Router Operations


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Routers must learn destinations that are not directly connected.

Router Operations (Cont.)


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Routers

Routers have the following components:

– CPU

– Motherboard

– RAM

– ROM

Routers have network adapters to which IP addresses are assigned.

Routers may have the following two kinds of ports:

– Console: For the attachment of a terminal used for management

– Network: Different LAN or WAN media ports

Routers forward packets based upon a routing table.


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Router Hardware


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LED Indicators


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Router Internal Components


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Switch Operation


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Switch Hardware


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Catalyst Switch LED Indicators


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• Cable


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Cable Type


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Network Interface Card


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Comparing Ethernet MediaRequirements


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Differentiating Between Connections


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1000BASE-T GBIC


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Cisco Fiber-Optic GBICs

Short wavelength (1000BASE-SX)

Long wavelength/long haul (1000BASE-LX/LH)

Extended distance (1000BASE-ZX)


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Network Media

Copper Cabling


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UTP Cabling

UTP Connectors


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RJ-45 Jack


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Cable 10BASE-T/

100BASE-TX Straight-Through

Pin Label Pin Label

1

2

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5

6

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8

TX+

TX-

RX+NC

NC

RX-

NC

NC

1

2

34

5

6

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8

TX+

TX-

RX+NC

NC

RX-

NC

NC

Straight-Through Cable

Wires on cable ends

are in same order.

UTP Implementation (Straight-Through)


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Cable 10BASE-T or

100BASE-TX Straight-Through Crossover Cable

Some wires on cable

ends are crossed.

Pin Label Pin Label

1

2

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5

6

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8

TX+

TX-

RX+NC

NC

RX-

NC

NC

1

2

34

5

6

7

8

TX+

TX-

RX+NC

NC

RX-

NC

NC

EIA/TIA T568A EIA/TIA T568B

UTP Implementation (Crossover)


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UTP Implementation: Straight-Through vs.Crossover


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Using Varieties of UTP


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Cable Lab


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UTP Cabling

Testing UTP Cables


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• Cisco IOS


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Cisco IOS Software

Features to carry the chosen network protocols and functions

Connectivity for high-speed traffic between devices

Security to control access and prohibit unauthorized network use

Scalability to add interfaces and capability as needed for networkgrowth

Reliability to ensure dependable access to networked resources


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Configuring Network Devices

Initial default settings are sufficient for the switch to operate atLayer 2 as a switch.

A Cisco device will prompt for initial configuration if there is noconfiguration in memory.

Additional configuration tasks set up the device with thefollowing:

– Protocol addressing and parameter settings

– Options for administration and management


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External Configuration Sources

Configurations can come from many sources.

Configurations will act in device memory.


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CLI is used to enter commands.

Operations vary on differentinternetworking devices.

Users type or paste entries in the consolecommand modes.

Command modes have distinctiveprompts.

Enter key instructs device to parse and

execute the command.

Two primary EXEC modes are user modeand privileged mode.

Cisco IOS User Interface Functions


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There are two main EXEC modes for enteringcommands.

Cisco IOS Software EXEC Mode (User)


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Cisco IOS Software EXEC Mode(Privileged)


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Switch Command-Line Help Facilities


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Viewing the Configuration


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Configuring Password


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IOS License


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Demo Cisco CLI


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Password Recovery Lab


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Password Recovery Proceduce (1)


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Password Recovery Proceduce (2)

Password recovery video:

Router: https://www.youtube.com/watch?v=XS5KENB2Yfw

Switch: https://www.youtube.com/watch?v=BSrudJ4MCCY


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day1 1 basic network

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