Cisco devices usually have four types of memory that are being used for different purposes. These four types are:
- ROM (Read-only memory) – stores a bootstrap program that is used to initialize a boot process. This is a read-only type of memory, so it can’t be altered.
- RAM (Random Access Memory) – the running configuration and routing tables of the device are stored here. This type of memory loses its content when a device is restarted.
- Flash memory – used to store IOS software images. Can also be used to store other files, for example backup configuration files. Retains its content even after a device is restarted.
- NVRAM (Nonvolatile RAM) – usually used to store a startup configuration file. This type of memory retains its content even after a device is powered down or restarted.
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What type of memory is used to store the configuration of the router?
The configuration file can be stored in a variety of places, including two inside a router. The router has a couple of other types of memory as well: RAM—Sometimes called DRAM for dynamic random-access memory, RAM is used by the router just as it is used by any other computer: for working storage.
What type of router memory is used to store the configuration used by the router when it is up and working?
Non-Volatile Random Access Memory (NVRAM) is used as the storage location for the router's startup configuration file.