Instructions Which command places the switch in global configuration mode? enable • console • configure terminal if
The Correct Answer and Explanation is:
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The correct answer is configure terminal.
Explanation
Network devices such as switches and routers that use a command-line interface (CLI), like Cisco’s Internetwork Operating System (IOS), employ a hierarchical mode structure. This structure ensures that an administrator has the appropriate level of privilege before making changes that could affect network operations. Understanding these modes is fundamental to network administration.
The primary modes are:
- User EXEC Mode: This is the initial, limited-access mode entered after logging into the device. The command prompt typically ends with a > symbol (e.g., Switch>). In this mode, one can perform only basic, non-disruptive monitoring tasks, such as using ping or limited show commands. No configuration changes are permitted from User EXEC mode.
- Privileged EXEC Mode: To gain higher-level access, the enable command is used from User EXEC mode. This transitions the CLI to Privileged EXEC mode, often called “enable mode.” The prompt changes to a # symbol (e.g., Switch#). This mode grants access to all monitoring and management commands, such as viewing the running configuration (show running-config), saving configurations, and rebooting the device. While powerful for inspection, it is not the mode for making configuration changes.
- Global Configuration Mode: This is the primary mode for modifying the device’s configuration. To enter this mode, an administrator must first be in Privileged EXEC mode and then execute the configure terminal command (often abbreviated as conf t). The prompt changes to Switch(config)#, indicating that the device is ready to accept commands that affect its overall operation. From here, an administrator can set a hostname, configure passwords, create VLANs, and enter even more specific sub-configuration modes, such as interface or line configuration.
The other options presented are incorrect. The console command is used to enter a specific line configuration mode (e.g., line console 0) from within global configuration mode, and if is not a valid command to change modes in this context.thumb_upthumb_down
