Flash Memory
The bootstrap program that initializes a router's basic hardware components is typically stored in the router's ROM (Read-Only Memory). ROM retains its contents even when the router is powered off, allowing the bootstrap program to be accessible during the boot process. This program performs hardware checks, loads the operating system, and prepares the router for operation.
NVRAM is that router component in which start up configuration file is stored.
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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
You can't. You will need to purchase a new router.
ROUTER
if your modem has wireless capblility then you don't need a router.
Ram
The router.
An electric router can perform several operations, including edge routing, which shapes and finishes the edges of wood; dado cutting, which creates grooves or channels in a board; mortising, which forms recesses for hinges or locks; and template routing, which allows for the precise duplication of shapes using a template. These operations make the router a versatile tool for woodworking projects.
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.