Flash Memory
NVRAM is that router component in which start up configuration file is stored.
for
boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes Sorce: CCNA Final Exam Module 4 Cisco789
ROUTER
You can't. You will need to purchase a new router.
Ram
if your modem has wireless capblility then you don't need a router.
The router.
console
Either... (a) you're router isn't working (b) you're out of range of your router or (c) your computer's wireless component isn't working.
SDRAM
It is defined the component which is control the system. It consists of router, bridge, switch, hub, repeater. All the components are acted at the same time.