NVRAM (Non-Volatile Random Access Memory) is the default storage location for the startup
configuration file of a Cisco router or switch.expand_more Here's why:
Non-Volatility: NVRAM retains its contents even when the device loses power.expand_more This is
essential for storing the startup configuration, which contains critical settings like interface
configurations, routing protocols, and passwords.
Read/Write Capability: Unlike ROM, NVRAM allows you to both read and write data. This makes it
possible to modify the configuration and save the changes into NVRAM as the startup configuration.
Other Memory Types and Their Functions:
RAM (Random Access Memory): RAM is volatile memory, meaning it loses its contents when the
device is powered off.expand_more It's used to store the running configuration (currently active
configuration), routing tables, and other temporary data required for the device's operation.
ROM (Read-Only Memory): ROM is non-volatile and stores the bootstrap program used to initiate the
boot process of the device.expand_more It's not modifiable by the user.expand_more
Flash: Flash memory is also non-volatile.expand_more It's primarily used to store the Cisco IOS
image (operating system) and can also store backup configuration files and other data.
