Command Line Interface CLI in Cisco IOS provides a command line interface to a remote computer with various Cisco IOS command modes for network administrator. IOS is an application which run as operating system for the networking devices like router or switch. The network administrator can change the configurations by basic commands of IOS in Cisco Router and maintain the networking device in a network by using Cisco IOS commands. It is just like working with RAM and ROM. The running configuration deleted automatically when the router goes power off. Every time when router power on the startup configuration settings comes by default. The startup configuration keep the setting in hard memory of router. It is not necessary the running configuration remain save and come back when the router rebooted due to any reason. Basically running configuration is the settings which are running when a router is in functional condition. The configuration remain save in IOS memory via two way running and startup configuration. IOS Internetwork Operating System provides the facility to run the No IP Domain Lookup Command of IOS of Cisco Router. IOS is acronym for Internetwork Operating System which is related to Cisco networking devices.
The No IP Domain Lookup Command of IOS in Cisco Router run by the CLI command lines. The result of basic commands of IOS in Cisco Router initially saved in running configuration and we need to copy the running configuration into the startup configuration.
Basic commands of IOS in Cisco Router relates to set the hostname, password etc on first time. In this article I describe No IP Domain Lookup Command of IOS in Cisco Routers and switches.