Cisco IOS
term that represents the operating
systems used by Cisco networking
devices
Shell
portion of operating system that
interacts with applications and the
user
kernel
portion of operating system that
interfaces directly with computer
hardware
GUI
a user-friendly interface that
provides an interaction between a
user and an OS through a
graphical environment
console
a physical port of a Cisco device
that provides access to the device
via a dedicated management
channel, also known as out-of-
band access
keyword
parameter with a predefined value
to be used by an IOS command
argument
parameter that has to be supplied
by the user to an IOS command
startup configuration
file that is stored in NVRAM and
that contains the configuration that
has been saved on a device to be
used upon startup or reboot
running configuration
file that is stored in RAM and that
contains the configuration that is
being done on a device
SVI
a logical interface used to
remotely manage a switch over an
IPv4 network
