ABSTRACT
Read-only memory. Code contained on ROM chips on the system board in routers performs power-on diagnos-
tics. This function is similar to the power-on self-test
that PCs perform. In network routers, OS software is
also loaded by a bootstrap program in ROM. Software
upgrades are performed by removing and replacing
ROM chips on some types of routers, while others may
use different techniques to store and manage the operat-
ing system.
