NVRAM
wr or copy running-config startup config
it save the current program to nvram
This is an incomplete command. However, this indicates that the running configuration will be saved on the device to a different location.
It is short for copy running-config starting-config. Running-config is the configuration of the router as you have modified it and which is currently operating, held in RAM (gone after a reboot), and you copy it to the starting-config which is in NVRAM and gets loaded by the router when it boots/ So essentially you're saving what you have now to the persistent storage so your router will still work after a reboot.
Router(config)#Copy running-config startup-config
**Switch-6J#
previlage mode i.e hostname#
NVRAM is an acronym for Non-Volatile Random Access Memory. NVRAM is a type of Random Access Memory (RAM) that retains its information when power is turned off. The NVRAM is a small 24 pin DIP (Dual Inline Package) integrated circuit chip and is thus able to obtain the power needed to keep it running from the CMOS battery installed in your motherboard. It keeps track of various system parameters such as serial number, Ethernet MAC (Media Access Control) address, HOSTID, date of manufacture, etc. NVRAM is therefore a type of non-volatile memory that offers random access SYED OWAIS ALI{TECHNICAL SPECALIST}
RouterC#copy running-config tftp [copy run tftp]
This command will copy the running configuration (located in RAM) of a Cisco device to a TFTP server. After executing the command you will be prompted for further information about the TFTP server (Server Address, file name, etc.).
previlage mode i.e hostname#