Cisco Networking: Memory and Protocols

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Questions and Answers

What type of memory is used to store the running configuration on a Cisco device?

EEPROM

ROM

RAM (correct)

Flash memory

Which of the following is a characteristic of SSH compared to Telnet?

SSH requires less bandwidth than Telnet

SSH encrypts messages for security (correct)

SSH connects using plaintext

SSH is limited to console connections only

In which mode of operation does an administrator enter commands to configure a device?

Line configuration mode

Privileged EXEC mode

User EXEC mode

Global configuration mode (correct)

Which naming convention is valid for naming a Cisco IOS device?

SwBranch799 Signup and view all the answers

What is the primary difference between SSH and Telnet?

SSH provides user authentication, while Telnet does not Signup and view all the answers

How does Flash memory differ from RAM in terms of data retention?

Flash memory retains data during power cycles Signup and view all the answers

What is the correct sequence to access global configuration mode from user EXEC mode?

Enter enable mode, then configure terminal Signup and view all the answers

Which CLI command would be used to enter privileged EXEC mode from user EXEC mode?

enable Signup and view all the answers

Which interfaces can be secured with passwords in Cisco IOS? (Choose three.)

console interface Signup and view all the answers

What purpose does the switch virtual interface (SVI) serve in a Layer 2 switch?

It allows for remote management of the switch. Signup and view all the answers

What will pressing the Tab key do when in the Cisco IOS command line?

Complete the remainder of a partially typed command. Signup and view all the answers

What should a technician do to revert to the NVRAM configuration after making unsaved changes?

Issue the reload command without saving changes. Signup and view all the answers

What functionality does the Ctrl-Shift-6 key combination provide on a Cisco switch?

Interrupts a command such as ping. Signup and view all the answers

Which of the following interfaces does NOT support password protection in Cisco IOS?

boot IOS mode Signup and view all the answers

What command is used to see the startup configuration file after changes were made to the running configuration?

copy startup-config running-config Signup and view all the answers

What is the main function of an auxiliary (AUX) interface on a switch?

To manage Layer 2 switches remotely. Signup and view all the answers

Which characteristic of an SVI indicates its relationship with physical interfaces on a switch?

It is not associated with any physical interface on a switch. Signup and view all the answers

What is the primary purpose of the 'show ip interface brief' command?

To provide a summary of the switch's interface statuses. Signup and view all the answers

Which of the following is a shortcut key combination used to interrupt an IOS process?

Ctrl-Shift-6 Signup and view all the answers

Which command provides context-sensitive help within the CLI?

? Signup and view all the answers

Which statement accurately describes an SVI's default configuration?

Each switch comes preconfigured with VLAN1 as its SVI. Signup and view all the answers

What does the command 'ipconfig' accomplish?

It provides TCP/IP configuration information on a host. Signup and view all the answers

Which of the following statements about SVIs is false?

SVIs require a physical connection to function. Signup and view all the answers

Which CLI shortcut allows a user to cycle through previously entered commands?

Up Arrow Signup and view all the answers

Study Notes

RAM and Flash Memory

RAM stores multiple versions of IOS and configuration files, functioning as volatile memory.
Data stored in RAM is lost during a power cycle, while the running configuration is retained in this memory.
Flash memory is nonvolatile, holding IOS and delivering it to RAM upon device power-up.

Cisco IOS Naming Conventions

Valid host names must start with a letter, contain no spaces, and end with a letter or digit.
Acceptable characters include letters, digits, and dashes, with a maximum length of 64 characters.
Examples of valid host names: “SwBranch799” while “Branch2!RM-3-Switch-2A4” and “Floor(15)” violate naming rules.

SSH vs. Telnet

SSH is secure, encrypting messages and requiring user authentication, while Telnet sends data in plaintext and lacks security.
SSH connections are made over the network, whereas Telnet usually requires an out-of-band connection.
Common terminal emulation programs: PuTTY for SSH and Tera Term for Telnet.

IOS Modes for Switch Configuration

Configuring a switch console password begins in user EXEC mode, then transitions to privileged EXEC mode after entering the enable command.
The next step is entering global configuration mode via the configure terminal command, followed by line console 0 to reach the configuration interface.

Characteristics of Switch Virtual Interfaces (SVIs)

SVIs are created in software and not associated with physical interfaces.
They provide remote management capabilities for switches over an IP network.
By default, SVIs are associated with VLAN1 in the switch’s configuration.

Verifying Switch Interface Status

The command show ip interface brief is used to check the status and configuration of switch interfaces.
Other commands like ‘ipconfig’ and ‘ping’ serve different purposes related to host properties and Layer 3 connectivity.

CLI Hot Keys and Shortcuts

Tab key completes partially typed commands or keywords.
Question mark (?) provides context-sensitive help.
Up Arrow allows scrolling through previously entered commands.
Ctrl-C cancels commands, returning to privileged EXEC mode; Ctrl-Shift-6 interrupts processes like ping.

Protecting Access with Passwords

Passwords can restrict access to the VTY and console interfaces, user EXEC mode, and privileged EXEC mode.
Additional security measures may be necessary for complete protection.

Remote Management of Layer 2 Switch

The switch virtual interface (SVI) on a Layer 2 switch facilitates remote management.

Command Completion Functionality

Pressing the Tab key during command entry completes the remainder of a partially typed command.

Discarding Unwanted Configuration Changes

To discard unsaved changes made during configuration, the technician should issue the reload command without saving.
Using copy startup-config running-config does not discard changes; it only adds to the current configuration.

Purpose of Ctrl-Shift-6 Key Combination

This key combination interrupts an IOS process, allowing the technician to halt ongoing commands like ping for troubleshooting.

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Description

This quiz covers key concepts in Cisco networking regarding RAM and Flash memory, highlighting their roles in device operation. Additionally, it explains Cisco IOS naming conventions and compares SSH and Telnet protocols. Test your knowledge on networking fundamentals and best practices.