tailieunhanh - Network Fundamentals – Chapter 11

Configuring and Testing Your Network. Learning Objectives Upon completion of this chapter, you will be able to: Define the role of the InternetworkOperating 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. | 111 a 111 a CISCO Configuring and Testing Your Network Network Fundamentals - Chapter 11 ITE I Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public 1 Objectives Learning Objectives - Upon 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. Configuring and Testing the Network - Identify the IOS modes of operation. - Identify the basic IOS commands. - Compare and contrast the basic show commands. ITE 1 Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public 2 Cisco IOS Similar 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. 7 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 purpose and feature set. The services provided by the Cisco IOS are accessed 1 using a command line interface CLI . r II ri I LI .Lc F-l I. -The IOS file itself is several megabytes in size and is stored in a memory area called flash. J r 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 ITE 1 Chapter 6 2006 Cisco Systems Inc. All rights reserved. Cisco Public