What are the two functions of NVRAM? (Select Two) ?to retain contents when power is removed to store the startup configuration file to store the MAC table to contain the running configuration file to store the ARP table
The correct answer and explanation is:
The two correct functions of NVRAM (Non-Volatile Random Access Memory) are:
- To retain contents when power is removed
- To store the startup configuration file
Explanation:
1. To retain contents when power is removed
NVRAM is a type of non-volatile memory, meaning it retains its data even when the power supply is turned off. This is in contrast to RAM, which loses its data when the system is powered down. In networking devices such as routers and switches, NVRAM plays a critical role in preserving essential data that must persist across device reboots. This capability ensures the device can recover its stored configurations and continue functioning without requiring manual reconfiguration after a power cycle.
2. To store the startup configuration file
The startup configuration file, which contains the saved settings of the device, is stored in NVRAM. This file is used to initialize the device’s configuration when it boots up. Administrators save their changes to this file after configuring the device, ensuring the settings are preserved even if the device is restarted. For example, commands like copy running-config startup-config are used to copy the current running configuration into NVRAM so that it becomes the startup configuration.
Incorrect Options:
- To store the MAC table: The MAC table is stored in dynamic memory (RAM) as it is volatile and frequently updated based on network activity.
- To contain the running configuration file: The running configuration resides in RAM because it is actively used and modified during operation.
- To store the ARP table: The ARP table is also stored in RAM because it is a temporary and dynamic cache that is refreshed periodically.
By retaining the startup configuration and data across power cycles, NVRAM ensures device reliability and readiness for consistent operation.