Mastering Cisco Configurations: The Essential Copy Command

Which command is used to copy the running configuration into the startup configuration?

• A. copy startup-config running-config
• B. copy running-config startup-config
• C. write memory
• D. save configuration

Answer: (B)

The command to copy the running configuration into the startup configuration is indeed the one that reads as "copy running-config startup-config." This command is crucial in Cisco networking because it ensures that any changes made to the device's configuration while it is in its active state (running configuration) are saved to the startup configuration. The startup configuration is the configuration that the device will use when it is rebooted. By executing this command, you finalize the configuration changes, ensuring that they are persistent across device reboots. The process effectively writes the current operational settings (running configuration) to be the default settings (startup configuration) that the device will load upon the next startup. In contrast, the other options either describe incorrect command sequences or functions. The first option would attempt to execute the opposite action, which is not valid as we need to copy the running configuration to the startup configuration, not the other way around. The third option, "write memory," was historically used in older Cisco IOS versions for the same purpose as the primary command, but it’s less common in newer practices and may not be directly linked in all IOS versions. Similarly, "save configuration" is a generic term but does not correspond to a recognized command in Cisco IOS. Therefore, the focus on

When it comes to mastering Cisco configurations, one command stands out like a beacon in the fog: copy running-config startup-config. If you’re preparing for the CCNA exam, you’ll undoubtedly want to know why this command is crucial. Let’s break it down—this is your lifeline to ensure that whatever changes you make to the running configuration persist beyond a reboot. You wouldn't want to lose your hard work, right?

Now, imagine this: you’ve spent hours tweaking settings, optimizing your router, engaging with various protocols—only to turn the device off and lose everything. Yikes! But when you execute copy running-config startup-config, you save those operational settings so that when your device starts fresh, it picks up right where you left off. In tech-speak, you’re writing the current operational settings to be the default ones when the device powers up again. It’s like setting your house alarm before going to bed—you want to make sure everything is still standing when you wake up!

But here’s where it gets interesting. Let’s look at the other contenders for this command. You might see options like copy startup-config running-config, which would do the opposite of what you want—yikes, that’s a misfire! Imagine hitting a undo button when you actually meant to save. Then there’s the write memory command—an oldie but a goodie in some versions of Cisco IOS. While it works with the same intention of saving your settings, it’s less commonly used in newer environments. You might compare it to that old flip phone you keep for nostalgia—sometimes it just doesn’t fit in anymore.

And don’t forget the vague term “save configuration.” Sounds good, right? But in the realm of Cisco IOS, this isn’t a recognized command. It’s like saying you’ll meet someone at the coffee shop—if you don’t have a specific location, you might end up waiting a while!

So, as you gear up for your CCNA journey, remember: the key to persistent device configurations lies in that simple command. It’s not just a piece of knowledge; it’s a lifeline for networking success. Keep this in your toolbox because when the pressure is on, the last thing you want is a configuration that doesn’t stick. Confidence comes from knowing your commands—grab that knowledge, wield it wisely, and watch your Cisco skills take flight!