Router Memory Components
ROM - Read
Only Memory (Bootstrap Program, POST and Startup program)
Flash Memory – IOS
(internetwork Operating System) Image file held here
“Flash file”
Bin
format
Erasable and reprogram
able ROM.
Content are kept on power
down or reload.
RAM - Maintaining
Routing table, NAT table & Running-configuration
RAM contents are lost on
reload.
NVRAM - Startup-configuration
Stored here.