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Embed code for: 04.2 Cisco IOS Software Features and Functions
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04.2 Cisco IOS Software Features and Functions
9/11/2016 Cisco ELearning for ICND1 v2.0 https://ondemandelearning.cisco.com/ciscosc/icnd1#/sections/4/pages/2 1/1 Cisco IOS Software Features and Functions Section 4: Operating Cisco IOS Software Like a computer, a switch or router needs an operating system to function. An operating system is the software that manages how various hardware components of a device function together. Just as an office needs a manager to supervise workers, a computing device needs an operating system. Many Cisco devices use Cisco IOS Software as their operating system. It is the core technology that extends across most of the Cisco devices, regardless of the size and type of the device. It is used for routers, LAN switches, small wireless APs, large routers with numerous interfaces, and many other devices. Cisco IOS Software delivers the following network services: Features to carry the chosen network protocols and functions Connectivity for highspeed traffic between devices Security to control access and prohibit unauthorized network use Scalability to add interfaces and capability as needed for network growth Reliability to ensure dependable access to networked resources The services that are provided by Cisco IOS Software are generally accessed using a CLI. The CLI is a textbased interface that is similar to the old Microsoft operating system called MSDOS. The CLI is accessed through a direct cabled connection called the console connection, a modem connection, or a Telnet or SSHsession. Regardless of which connection method is used, access to the Cisco IOS CLI is generally referred to as an EXEC session. The features that are accessible via the CLI vary, based on the version of Cisco IOS Software and the type of device. Up Next: Cisco IOS CLI Functions