Which Command Will Display The Current Contents Of Non-volatile Random-access Memory (Nvram)?

In this topic, we are going to learn about the command which is used for showing the non-volatile random access memory’s current contents. Before we discuss the command, we have to learn what is a non-volatile random access memory. By shortly, we refer to it as NVRAM. We all know about random access memory. At least we all heard this word. This random access memory is a computer memory usually referred to by using the initials RAM which is used for storing data which are we currently working with, state of a computer, and it also stores the machine codes. And it has a feature that the data stored here can be access or change the data in it can be in any order.

This NVRM is also a type of random access memory so that it may store the data we are currently working with. Without applied power, NVRAM can retain the data stored in it. This type of random access memory is different from other types of random access memories. There are other memories such as static random access memory, which is referred to by SRAM, and dynamic random access memory, which is referred to as ad DRAM, etc. The above two are under the type of random access memories. They only keep data when we applying the power. So if power is gone, it loses data. Or we can refer to these types of memories as magnetic tape, where there is no assurance in retaining data if we are not applying electric power. One of the uses of read-only memory is that the embedded system’s system firmware can be stored by using this type of memory. To bootstrap a computer system, there are some initial processor instructions. And these instructions can be held by using the read-only memories.

The read-write memories are usually integrated into a microcontroller and used for storing different data such as:

  • Passwords.
  • Calibration constants.
  • Setup information. Etc.

If there is any power interruption occurred, the time needed to restart the system again is less since the non-volatile nature of the main memory of the computer system.

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There may be many contents present in the non-volatile random access memory. All of which can be display by using a command, startup-configuration. This is done by writing the command in the following format:

Switch#show startup-configuration.

For storing a computer system’s state, two types of non-volatile random access memories are used.

  1. Electrically erasable programmable read-only memory.
  2. Static random access memory.

The second one has just come before the DRAM. Data accessibility is faster than other RAMs. And accessing those data at byte-level. That means it can access multiple bytes at a time.

This type of RAM is volatile, so it won’t keep data when the power goes. But it can make non-volatile just by using a battery to make the power constant. Where the first type depends on the floating gate transistor. For the switch, it uses a well insulating material. So the transistor only keeps the last state of the computer only if a high voltage is applied to that gate.

I hope you have understood the explanation for the question “Which Command Will Display The Current Contents Of Non-volatile Random-access Memory (Nvram)?”.