chapter11 - Configuring and Testing Your Network Network...

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© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE I Chapter 61Configuring and Testing Your NetworkNetwork Fundamentals – Chapter 11Modified by Tony Chen02/19/2009
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 62Notes:If you see any mistake on my PowerPoint slides or if you have any questions about the materials, please feel free to email me at [email protected].Thanks! Tony ChenCollege of DuPageCisco Networking Academy
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 63ObjectivesLearning ObjectivesUpon completion of this chapter, you will be able to:Define the role of the Internetwork Operating System (IOS).Define the purpose of a configuration file.Identify several classes of devices that have the IOS embedded.Identify the factors contributing to the set of IOS commands available to a device.Identify the IOS modes of operation.Identify the basic IOS commands.Compare and contrast the basic show commands.
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 64Cisco IOSSimilar to a personal computer, a router or switch cannot function without an operating system. The Cisco Internetwork Operating System (IOS) is the system software in Cisco devices. It is used for routers, LAN switches, small Wireless Access Points, and many other devices. –The IOS operational vary depending on different devices, the device's purposeand feature set.•The services provided by the Cisco IOS are accessed using a command line interface (CLI). The IOS file itself is several megabytes in size and is stored in a memory area called flash. •Flash memory provides non-volatile storage. •Using flash memory allows the IOS to be upgraded to newer versions or to have new features added. –The IOS is copied into RAM when the device is powered on and the runs from RAM when the device is operating.The Cisco IOS provides the following services: Basic routing and switching functions Reliable and secure access to network resources –Network scalability
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 65Cisco IOS Access Methods: ConsoleConsole–The CLI can be accessed through a console session, also known as the CTY line. Console uses low speed serial connection directly connect computer to console port on the router or switch. –The console port is a management port that provides out-of-band access to a router. –The console port is accessible even if no networking services have been configured on the device. –Examples of console use are: •The initial configuration of the network device•Disaster recovery procedures and troubleshooting where remote access is not possible•Password recovery procedures–For many IOS devices, console access does not require any form of security, by default.

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