CCNAv7 Part 2

GUI

Allows the user to interact with the system using an environment of graphical icons, menus, and windows.

Global Configuration Mode

Commands entered in this mode affect the entire system,

Kernel

Communicates between the hardware and software of a computer and manages how hardware resources are used to meet software requirements.

Switch# Router#

Privileged EXEC Mode

disable

Privileged EXEC mode command to return to user EXEC mode.

AUX port

Establish a CLI session remotely over a telephone connection using a modem.

Router(config)# Switch(config)#

Global Configuration Mode

exit

Global config mode command, to return to the privileged EXEC mode.

Secure Shell (SSH)

Is an in-band and recommended method for remotely establishing a secure CLI connection, through a virtual interface, over a network. Unlike a console connection, these connections require active networking services on the device, including an active interface configured with an address.

Hardware

The physical part of a computer including underlying electronics.

Shell

The user interface that allows users to request specific tasks from the computer. These requests can be made either through the CLI or GUI interfaces

Console

This is a physical management port that provides out-of-band access to a Cisco device. Out-of-band access refers to access via a dedicated management channel that is used for device maintenance purposes only. The advantage of using a console port is that the device is accessible even if no networking services are configured, such as performing the initial configuration. A computer running terminal emulation software and a special console cable to connect to the device are required for a console connection.

Privileged EXEC Mode

To execute configuration commands, a network administrator must access this mode. Higher configuration modes, like global configuration mode, can only be reached from this mode. this mode can be identified by the prompt ending with the # symbol.

end

To move from any subconfiguration mode to the privileged EXEC mode,

enable

To move from user EXEC mode to privileged EXEC mode.

configure terminal

To move in and out of global configuration mode.

Interface Configuration Mode

Used to configure a switch port or router network interface.

Line Configuration Mode

Used to configure console, SSH, Telnet, or AUX access.

Switch> Router>

User Exec Mode

Keyword

a specific parameter defined in the operating system

Switch(config-if)#

interface configuration mode

Telnet

is an insecure, in-band method of remotely establishing a CLI session, through a virtual interface, over a network. Unlike SSH, This does not provide a secure, encrypted connection and should only be used in a lab environment. User authentication, passwords, and commands are sent over the network in plain text.

Argument

is not predefined; it is a value or variable defined by the user

CLI

less resource intensive and very stable when compared to a GUI.

Switch(config-line)#

line configuration mode

User EXEC Mode

this mode has limited capabilities but is useful for basic operations. It allows only a limited number of basic monitoring commands but does not allow the execution of any commands that might change the configuration of the device.

line

to enter line sub configuration mode,