[DCN] Module 2 - BASIC SWITCH AND END DEVICE CONFIGURATION

Shell

• user interface that allows users to request specific tasks from the computer.

• can be made either through the CLI or GUI interfaces.

Kernel

• Communicates between the hardware and software of a computer'

• Manages how hardware resources are used to meet software requirements.

Hardware

physical part of a computer including underlying electronics

GUI (Graphical User Interface)

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

Console

physical management port used to access a device in order to provide maintenance, such as performing the initial configurations.

Secure Shell (SSH)

Establishes a secure remote CLI connection to a device, through a virtual interface, over a network.

Telnet

Establishes an insecure remote CLI connection to a device over the network.

Terminal Emulation Programs

used to connect to a network device by either a console port or by an SSH/Telnet connection.

• PuTTY, Tera Term and SecureCRT.

User EXEC Mode

• Allows access to only a limited number of basic monitoring commands

• ends with the > symbol

Privileged EXEC Mode

• Allows access to all commands and features

• Identified by the CLI prompt that ends with the # symbol

Global Configuration Mode

Used to access configuration options on the device

Line Configuration Mode

Used to configure console, SSH, Telnet or AUX access

Interface Configuration Mode

Used to configure a switch port or router interface

enabled command

move from user EXEC mode to privilege EXEC mode

configure terminal command

move in and out of global configuration mode

exit command

• Global Configuration Mode: return to privilege EXEC mode

• Line Configuration Mode: return to global configuration mode

• Subconfiguration Modes: move out of any subconfiguration mode to get back to global configuration mode