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When a router boots up, it performs a series of steps, called the boot sequence, to test the hardware and load the necessary software.

1. The router performs a POST. The POST tests the hardware to verify that all components of the device are operational and present. For example, the POST checks for the different interfaces on the router. The POST is stored in and run from ROM (read-only memory).

2. The bootstrap looks for and loads the Cisco IOS software. The bootstrap is a program in ROM that is used to execute programs. The bootstrap program is responsible for finding where each IOS program is located and then loading the file. By default, the IOS software is loaded from flash memory in all Cisco routers.

3. The IOS software looks for a valid configuration file stored in NVRAM. This file is called startup-config and is only there if an administrator copies the running-config file into NVRAM.

4. If a startup-config file is in NVRAM. the router will load and run this file. The router is now operational. If a startup-config file is not in NVRAM, the router will start the setup-mode configuration upon bootup.

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โˆ™ 2011-02-23 08:33:05
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Q: Which sequence does a router follow during startup?
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If a router cannot find a valid configuration file during the startup sequence what will occur?

The router will prompt the user for a response to enter setup mode.


What is the purpose of NV RAM on a Cisco router?

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What is the next step in the router boot sequence after the IOS loads from flash?

**Locate and load the startup-config file from NVRAM.


What is the consequence of issuing the erase startup-configcommand in privileged EXEC mode on a Cisco router?

The startup configuration will be erased and if the router is restarted will boot with no configuration.


What is the difference between a router's running configuration and startup?

The startup config is what has been saved to the memory (using write mem) and is used when the router is powered on. You can change the startup config after it has been powered up, this would be the running config. If you power the router off without saving the changes, it would revert to the startup config.


What is the router memory used to store the startup configuration?

NVRAM


What command is to show router boot up process?

startup config


What is the effect of using th Router copy running-config startup-config command on the router?

The contents of NVRAM will change


What information about the router and its startup process can be gathered from the output of the show version command?

A


Which location of router memory is cleared with the erase startup-config command?

NVRAM


You want to replace the current running-config with the current startup-config and totally reinitialize the router . What command will you use?

You want to totally reinitialize the router and replace the current running-config with the current startup-config. What command will you use?


Which memory contents will change as a result of using the Router erase startup-config command on a router?

It will erase start up config from NVRAM.


What is setup mode?

When a Cisco router is booted up for the first time, or is reloaded, the router will look into its Non-Volatile RAM (NVRAM) for the startup configuration file. Setup Mode is usedto configure a Cisco router or switch after start up to create a startup configuration file.


Which router component will have contents erased when the command erase startup-config is issued?

NVRAM


Which components is affected by using the copy startup-config running-config command on a router?

NVRAM


What can a network administrator do to recover from a lost router password?

boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes Sorce: CCNA Final Exam Module 4 Cisco789


Which of the following would be the correct command sequence to enable RIP on Router B for all connected networks?

RouterB(config)# router rip


What command do you type to save the configuration stored in RAM to NVRAM?

Router(config)#Copy running-config startup-config


What is the correct command sequence to configure a router host name to LAB A?

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What is the default sequence for loading the configuration file on a router?

NVRAM, TFTP,Console


Which memory contents will change as a result of using the router erase startup-config command on router?

It cancels only configurations settings, such as securuty, DHCP ip range, static ip settings and so on...


How do you configure RIP routing protocol on a Cisco router?

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What are the consequences of reloading a router without saving the running configuration to the startup configuration?

It depends on model. Some models can save some data without reloading, some can't. Thus you can have partially configured router or not configured at all. But reloading is not going to damage your router.


What is the consequence of issuing the erase startup-config command in privileged EXEC mode on a Cisco router?

Data Stored in the NVRAM will be erased


Which command sequence will permit access to five router virtual terminal lines with a password of cisco?

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