Cisco IOS Overview and Access Methods

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Questions and Answers

What is the purpose of Cisco IOS?

  • To enhance the physical security of server rooms.
  • To serve as the operating system for network devices such as routers and switches. (correct)
  • To manage software updates for network devices.
  • To provide a graphical user interface for network devices.

Which command is used to enter privileged EXEC mode?

  • enable (correct)
  • exit
  • configure terminal
  • copy running-config startup-config

Which method is considered insecure for remote access to a Cisco device?

  • Privileged EXEC Mode
  • Console Port
  • Secure Shell (SSH)
  • Telnet (correct)

Which command saves the current configuration to NVRAM?

<p>copy running-config startup-config (C)</p> Signup and view all the answers

What is the prompt for Global Configuration Mode in Cisco IOS?

<p>Switch(config)# (D)</p> Signup and view all the answers

Cisco IOS is used exclusively for desktop computers.

<p>False (B)</p> Signup and view all the answers

The prompt for privileged EXEC mode is Switch#.

<p>True (A)</p> Signup and view all the answers

Secure Shell (SSH) is a secure method for remote access to Cisco devices.

<p>True (A)</p> Signup and view all the answers

The command 'erase startup-config' is used to save the current configuration.

<p>False (B)</p> Signup and view all the answers

User EXEC Mode allows for advanced configuration commands.

<p>False (B)</p> Signup and view all the answers

Flashcards

Cisco IOS purpose

Cisco IOS is the operating system for network devices (routers, switches, etc).

User EXEC mode

Basic commands for viewing network devices.

Privileged EXEC mode

Advanced commands for configuration and management.

Global configuration mode

Device-wide settings and configurations.

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Save configuration (Cisco)

Saving changes to NVRAM using copy running-config startup-config.

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Cisco IOS Access Methods

Cisco IOS offers various ways to connect to and manage network devices. The console port provides direct physical access. Secure Shell (SSH) enables secure remote access. Telnet offers remote access but is less secure and should be avoided.

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What is the command to enter privileged EXEC mode?

The command 'enable' is used to elevate from User EXEC mode to Privileged EXEC mode, granting access to advanced commands for configuration and management.

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Move between configuration modes

To navigate between different configuration modes within Cisco IOS, use 'configure terminal' to enter Global Configuration mode, 'exit' to move up a level, and 'end' or Ctrl-Z to return to Privileged EXEC mode.

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Save configuration to NVRAM

To save the current running configuration to the non-volatile RAM (NVRAM) for persistent storage, use the command 'copy running-config startup-config'.

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Secure console access

To protect console access on a Cisco device, use the command 'line console 0' followed by the desired security settings, including passwords.

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Study Notes

Cisco IOS Overview

  • Cisco IOS is the operating system for network devices like routers and switches.
  • It provides a Command-Line Interface (CLI) for managing the devices.

Access Methods

  • Console Port: Physical connection for direct access.
  • Secure Shell (SSH): Encrypted remote access.
  • Telnet: Remote access (avoid due to lack of security).

Cisco IOS Command Modes

  • User EXEC Mode: Basic commands; read-only access. Prompt: Switch>
  • Privileged EXEC Mode: Advanced configuration and management commands. Prompt: Switch#
  • Global Configuration Mode: Device-wide settings. Prompt: Switch(config)#
  • Interface Mode: Configures specific network ports.
  • Line Mode: Configures console, Telnet, and SSH access.

Important Commands

  • Mode Changes:
    • enable: Enters privileged EXEC mode.
    • configure terminal: Enters global configuration mode.
    • exit: Moves to the previous mode.
    • end or Ctrl-Z: Exits to privileged EXEC mode.
  • Configuration Saving:
    • copy running-config startup-config: Saves running configuration to NVRAM.
    • erase startup-config: Removes the saved configuration.

Security Configuration

  • Passwords:
    • Secure privileged EXEC access: enable secret [password].
  • Console Access Security: (More detail needed.)

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