Chapter 1 Flashcards by Damia Qistina

What is the main objective of the Basic Device Configuration module?

Configure devices using security best practices.

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What are the five steps in the switch boot sequence after powering on?

Load POST program stored in ROM
Load boot loader software
Perform low-level CPU initialization
Initialize the flash file system
Load default IOS operating system

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What does the System LED (SYST) indicate on a switch?

Shows whether the system is receiving power and functioning properly.

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What does the Port Status LED (STAT) indicate when it is green?

Indicates port status mode is selected.

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What is the purpose of configuring a switch with an IP address and a subnet mask?

To prepare the switch for remote management access.

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What is the recommended VLAN for management access on a switch?

Use a VLAN other than VLAN 1 for the management VLAN.

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Fill in the blank: The command to enter global configuration mode is _______.

configure terminal

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What command is used to verify the status of both physical and virtual interfaces?

show ip interface brief and show ipv6 interface brief.

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What is the definition of full-duplex communication?

Allows both ends of a connection to transmit and receive data simultaneously.

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What is the default setting for duplex and speed on Cisco Catalyst switches?

Auto.

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What are the IOS commands to configure the duplex and speed for a switch interface?

duplex full
speed 100

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True or False: Auto-MDIX allows either straight-through or crossover cables to be used.

True.

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What does the command ‘show interfaces’ display?

Interface status and configuration.

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What does it mean if the output of ‘show interfaces’ shows ‘FastEthernet0/18 is up’?

The hardware layer is operational.

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What is the purpose of the Telnet protocol?

To provide remote access to devices using unsecure plaintext transmission.

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What is the TCP port used by Telnet?

23.

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What kind of communication does half-duplex mode represent?

Unidirectional communication.

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What is the effect of mismatched duplex settings on switch ports?

Can cause connectivity issues.

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What is the command to save the running configuration to startup configuration?

copy running-config startup-config.

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Fill in the blank: For IPv6, a switch does not require an IPv6 default gateway because it receives its default gateway information from _______.

a router advertisement (RA) message.

What command is used to examine the auto-MDIX setting for a specific interface?

show controllers ethernet-controller.

What does the Port Duplex LED (DUPLX) indicate when it is green?

Indicates port duplex mode is selected.

What should be done if the line protocol is down but the interface is up?

Check for encapsulation type mismatch or hardware problems.

What is the significance of the command ‘show mac-address-table’?

Displays the MAC address table.

What TCP port does Telnet use?

TCP port 23 ## Footnote Telnet operates over this port for unsecure plaintext transmission.

What is a major security issue with Telnet?

Unsecure plaintext transmission of login credentials and data ## Footnote This makes it vulnerable to packet monitoring by threat actors.

What TCP port does SSH use?

TCP port 22 ## Footnote SSH is a secure protocol designed to replace Telnet.

What does SSH provide for remote connections?

Strong encryption for authentication and transmitted data ## Footnote This ensures that usernames and passwords are encrypted.

What command is used to verify SSH support on a switch?

show ip ssh ## Footnote This command checks if the switch supports SSH.

What must be included in the IOS filename to support SSH?

The combination 'k9' ## Footnote This indicates the IOS includes cryptographic features.

What is the first step to configure SSH on a switch?

Verify SSH support using the show ip ssh command ## Footnote If the command is unrecognized, the IOS does not support SSH.

What command is used to generate RSA key pairs for SSH?

crypto key generate rsa ## Footnote This command enables the SSH server on the switch.

Fill in the blank: To delete the RSA key pair, use the _______ command.

crypto key zeroize rsa ## Footnote This action automatically disables the SSH server.

What is required to configure user authentication for SSH?

Create a username and password pair ## Footnote Use the username username secret password command.

What command enables the SSH protocol on the vty lines?

transport input ssh ## Footnote This command is used in line configuration mode.

What version of SSH should be enabled for improved security?

SSH version 2 ## Footnote This can be enabled using the ip ssh version 2 command.

What is the purpose of a loopback interface?

It is a logical interface used for testing and managing a Cisco IOS device ## Footnote It ensures that at least one interface will always be operational.

What command is used to display a summary of all interfaces on a router?

show ip interface brief ## Footnote This command shows operational status and IP addresses of interfaces.

What does a 'C' code signify in the routing table?

It indicates a directly connected network ## Footnote This is shown when the interface is configured with a global unicast address.

What is required for an interface to be operational?

Configured with at least one IP address and activated using no shutdown ## Footnote Interfaces must also be connected to another device.

What command reveals the detailed configuration of a specific interface?

show running-config interface interface-id ## Footnote This command displays the commands applied to the specified interface.

True or False: A link-local address is automatically added to an IPv6 interface when a global unicast address is assigned.

True ## Footnote Link-local addresses are required for IPv6 interfaces.

What command is used to verify the routes in the routing table?

show ip route ## Footnote This command displays the contents of the IPv4 routing table.

List three items that need to be configured in a switch for remote management access.

* Unique hostname * Correct network connectivity settings * User authentication configuration ## Footnote These configurations are essential for secure remote access.

What does the command copy running-config startup-config do?

Saves the current configuration to NVRAM ## Footnote This ensures that the configuration persists after a reboot.

How does full-duplex communication increase bandwidth efficiency?

Allows simultaneous transmission and reception of data ## Footnote This effectively doubles the available bandwidth compared to half-duplex communication.

What feature must be enabled for a switch interface to automatically detect the required cable connection type?

Auto-MDI/MDIX ## Footnote This feature allows automatic detection of the cable type.

What is the difference between Telnet and SSH?

Telnet transmits data in plaintext while SSH encrypts data ## Footnote SSH provides a secure alternative to Telnet.