Cisco 100-490 Exam Dumps & Practice Test Questions
Question No 1:
When setting up Cisco Catalyst 3850 Series switches, which two modes of operation can be selected for the system?
A. Active mode and Standby mode
B. Install mode and Bundle mode
C. Boot mode and Run mode
D. Exec mode and User mode
Answer: B. Install mode and Bundle mode
Explanation:
The Cisco Catalyst 3850 Series switches offer two primary modes that define how the switch operates and handles software: Install mode and Bundle mode. These modes control how the software is managed, installed, and maintained. Here is a breakdown of each mode:
Install Mode: In Install mode, the Cisco Catalyst 3850 switches operate with a modular software package. The operating system and features are divided into individual packages, and the switch can load the required components as necessary. This method is more efficient and flexible in terms of system resource management because only the essential components are installed. It also allows for the updating of individual packages without needing to modify the entire system. Install mode is typically preferred for large, complex environments where custom configurations and optimal resource usage are important.
Bundle Mode: In Bundle mode, the operating system is provided in a single large package, called a "bundle." This means that all necessary components and features are combined into one cohesive image that the system installs and operates as a whole. While this mode simplifies deployment and software updates, it is less flexible compared to Install mode. Every update or modification requires the entire bundle to be updated. Bundle mode is more commonly used in smaller environments or where simplicity and ease of deployment are the priority.
Choosing between Install mode and Bundle mode depends on the specific requirements of the network. Install mode is better suited for environments requiring more customization and flexibility, while Bundle mode is more straightforward and easier to deploy for smaller networks.
Question No 2:
Which command on Cisco devices is used to show all the available file systems, including local storage and remote file systems, that the device can interact with?
A. show memory
B. show directory
C. show file system
D. show version
Answer: C. show file system
Explanation:
On Cisco networking devices, file systems are used to store various types of configuration files, logs, and software images. These devices can interact with multiple file systems, including local storage devices (like internal flash memory) and remote storage systems (such as TFTP or FTP servers). To view a list of all available file systems, the appropriate command must be used.
The correct command is show file system.
Why show file system?
The show file system command provides a comprehensive list of all the file systems that the Cisco device can access. This includes local storage (like the internal flash memory) and remote systems (like FTP or TFTP servers). The output of this command provides valuable information about each file system, including its type, available space, and status, which helps network administrators determine where files can be stored or accessed.
A. show memory:
The show memory command displays information about memory usage on the device, including RAM and flash memory, but it does not list the available file systems.
B. show directory:
The show directory command shows the contents of a specific directory, usually within the flash file system, but it does not list all available file systems. It is more useful for managing files in a specific file system rather than listing all accessible systems.
D. show version:
The show version command provides detailed information about the device's hardware and software configuration, such as the IOS version, uptime, and model. However, it does not list available file systems.
In summary, the show file system command is the best option for listing all file systems accessible on a Cisco device and providing administrators with important details about available storage locations.
Question No 3:
When the command "show ip interface brief" is executed on a Cisco device, which two pieces of information will be displayed in the output? (Select two.)
A. Layer 2 address
B. Keepalive
C. Layer 3 address
D. Encapsulation type
E. Interface status
Answer: The correct answers are:C. Layer 3 address
E. Interface status
Explanation:
The "show ip interface brief" command is commonly used on Cisco devices to display a summary of the IP interfaces, offering essential information in a compact format. It shows the operational status of the interfaces and basic configurations such as whether the interface is up or down, along with the IP address assigned to the interface.
Layer 3 Address (Option C):
The Layer 3 address, which refers to the IP address, is one of the key pieces of information displayed by the "show ip interface brief" command. The IP address allows the device to communicate over a network. If no address has been configured, it will display "unassigned."
For example:
GigabitEthernet0/0 192.168.1.1 YES manual up up
In this case, 192.168.1.1 is the Layer 3 address of the interface GigabitEthernet0/0.
Interface Status (Option E):
The interface status indicates the operational state of the interface, shown as "up" or "down." This helps identify whether the interface is physically connected or not. Additionally, the logical status may also be up or down depending on whether the interface is administratively enabled or disabled.
For example:
GigabitEthernet0/0 192.168.1.1 YES manual up up
This example shows that the interface is both physically up and logically up.
Why Not Other Options?
Layer 2 address (Option A): The "show ip interface brief" command does not display the MAC (Media Access Control) address, which is the Layer 2 address. To view the Layer 2 address, you would need to use the "show interface" command instead.
Keepalive (Option B): Keepalive is a protocol used to monitor the status of a link, but it is not shown by the "show ip interface brief" command. Keepalive settings are typically seen in specific interface configurations.
Encapsulation type (Option D): Information regarding encapsulation (such as PPP or HDLC) is not shown by this command. To view encapsulation details, the "show interface" command must be used.
In conclusion, the "show ip interface brief" command provides crucial information, such as the Layer 3 IP address and interface status, making options C and E the correct answers.
Question No 4:
Which of the following commands is used to send an "echo request" packet to a target host and wait for an "echo response" message in a network environment?
A) echo
B) access
C) ping
D) connect
Answer: C) ping
Explanation:
In networking, the ping command is a tool used to test the reachability of a host on an IP network. It works by sending an "echo request" packet to the specified target host and waits for an "echo reply." "Ping" stands for Packet Internet Groper, and it is primarily used for diagnostic purposes to check whether a computer can communicate with another device on a network.
When you execute the ping command, it sends ICMP (Internet Control Message Protocol) Echo Request packets to the target host. The response time is measured by the round-trip time (RTT) of the Echo Reply message. If the target is reachable and responsive, the reply is returned. This helps administrators assess network connectivity and latency.
For example, running the command:
ping 192.168.1.1
The device sends an Echo Request to 192.168.1.1, and if the host is reachable, it responds with an Echo Reply. This enables users to verify network connection status.
The other options listed (echo, access, connect) do not serve the same function as the ping command:
echo: This command displays text or variables, not network packets.
access: This command typically deals with user or device access management and is not used for network testing.
connect: This command is used for initiating connections between devices, but does not test reachability via Echo Request/Reply.
Thus, the correct answer is ping, which is specifically designed for sending echo request packets and awaiting a response.
Question No 5:
Which command in a network device is used to display detailed information about the carrier network, cell site, and available service in a cellular unit?
A. show cellular unit network
B. show cellular unit radio
C. show cellular unit hardware
D. show cellular unit profile
Answer: A. show cellular unit network
Explanation:
The show cellular commands are essential for retrieving important details about a cellular modem or unit in a networking environment. These commands help network administrators troubleshoot and understand the status of the cellular connection.
Detailed Breakdown of the Commands:
A. show cellular unit network:
This command provides detailed information about the carrier network, including the specific cell site the device is connected to, the network type (e.g., LTE, 5G), signal strength, and service availability. It is vital for evaluating the health and performance of the cellular connection, considering parameters such as signal quality and frequency bands.
B. show cellular unit radio:
This command displays information about the radio interface of the cellular unit, such as radio signal strength and quality. However, it does not provide specific details about the carrier network, cell site, or service availability. Instead, it focuses on the radio aspect, including parameters like RSSI and SINR.
C. show cellular unit hardware:
This command provides hardware-related information, such as the model number, firmware version, and hardware status of the cellular unit. It does not provide details about the carrier network, cell site, or service availability and is more useful for diagnosing hardware issues.
D. show cellular unit profile:
This command shows the configuration profile of the cellular unit, including settings like APN, username, and password. However, it does not display real-time information about the carrier network or available services.
Conclusion:
The show cellular unit network command is designed to provide a comprehensive view of the carrier network, cell site, and available service, making it the correct choice for network administrators who need to assess the status of cellular connectivity.
Question No 6:
When using the CLI command show cdp neighbors, what two pieces of information about a neighboring device are displayed? (Choose two.)
A. Platform
B. Uptime
C. Device ID
D. Cisco IOS Software Version
E. IP Address
Answer:
A. Platform
C. Device ID
Explanation:
The show cdp neighbors command is a valuable tool for gathering information about directly connected Cisco devices using Cisco Discovery Protocol (CDP). CDP is a proprietary protocol that helps network administrators manage and troubleshoot networks by providing details about neighboring Cisco devices like routers, switches, and other network equipment.
When you execute the show cdp neighbors command, it displays a summary of the neighboring devices in a table format. Two key pieces of information provided are:
Device ID (C): This is a unique identifier for the neighboring device, usually corresponding to the hostname of the device. It is important for identifying which device is connected, especially in larger networks with multiple interconnected devices. The device ID enables network administrators to easily identify the device being referenced in the output.
Platform (A): The platform refers to the type of device or hardware model of the neighboring device. For example, it could indicate whether the device is a router, switch, or a specific model like the Cisco 2900 series router or Catalyst 9000 series switch. This information is important for understanding the capabilities and features available on the neighboring device, as different platforms have different hardware specifications.
Other details, such as IP address (E) and Cisco IOS Software version (D), can be obtained using different commands or parameters, but they are not typically displayed by default with the show cdp neighbors command. The uptime (B) of the device is also not shown by this command and can be found with commands like show version.
Thus, the device ID and platform are the most relevant data points provided by the show cdp neighbors command for identifying and managing neighboring devices.
Question No 7:
What type of custom scripting has Cisco NX-OS introduced to assist in managing and automating user networks?
A. C++
B. Collective
C. SQL
D. Python
Answer: D. Python
Explanation:
Cisco NX-OS, the operating system used in Cisco's Nexus switches, has introduced Python scripting to help with network automation and management. This feature allows network administrators to automate tasks, configure devices, and troubleshoot more effectively.
Python is a widely adopted programming language known for its simplicity, readability, and strong community support. It is particularly beneficial for automating network tasks as it integrates easily with existing network devices, APIs, and tools. By using Python scripts in Cisco NX-OS, administrators can automate network configuration, monitoring, and troubleshooting tasks, making network management more efficient.
One of the key advantages of Python in Cisco NX-OS is its support for third-party libraries and frameworks that can further enhance the automation process. Python scripts can be run directly from the NX-OS system or remotely using tools such as Ansible, which integrates Python scripts into broader network automation workflows.
In contrast, other options like C++ are used for system-level programming, SQL is for database management, and Collective is not relevant to network scripting. Therefore, Python is the best choice for custom scripting in Cisco NX-OS, enabling more efficient and scalable network operations.
Question No 8:
Which of the following commands is used to display the configuration register setting on a Cisco device?
A. show flash
B. show running-config
C. show version
D. show config-register
Answer: D. show config-register
Explanation:
The configuration register in Cisco devices is a 16-bit value that controls the device's behavior during the boot process. It determines functions like whether the device will boot from the startup configuration or bypass it, as well as settings for password recovery and ROMmon mode.
To view the current configuration register setting, the command to use is:
show config-register
This command will display the value of the configuration register, which is essential for troubleshooting and system management. For example, a value like 0x2102 indicates the device will boot using the startup configuration saved in NVRAM (Non-Volatile Random-Access Memory). A value like 0x2142 means the device will bypass the startup configuration, commonly used during password recovery.
Let's briefly review the other options:
show flash: Displays the contents of the flash memory,
Question No 9:
In the interface configuration prompt on Cisco devices, which command is used to return to the main configuration prompt?
A. end
B. clear
C. quit
D. exit
Answer: A. end
Explanation:
In Cisco networking devices, such as routers or switches, the command-line interface (CLI) is used for configuration and management. When you access a specific mode like the interface configuration mode, you need to exit back to a higher mode, such as the global configuration prompt, where you can make other system-wide configurations.
The CLI is organized into different modes, each designed for specific tasks. Some of the key modes include:
User EXEC Mode: This is the first mode you enter when accessing the device, which allows basic monitoring commands.
Privileged EXEC Mode: This mode allows you to perform more advanced commands such as system configuration and diagnostics.
Global Configuration Mode: This mode allows you to make system-wide changes and configurations.
Interface Configuration Mode: A sub-mode within the global configuration mode that allows you to configure the specific settings of network interfaces (e.g., Ethernet, Serial).
When you're in the interface configuration mode (for example, configuring GigabitEthernet0/0), to exit and return to the global configuration mode, the correct command is "end". This command immediately takes you out of the current sub-configuration mode and brings you back to the global configuration mode, where you can continue configuring other settings or exit completely to the main command line.
The other options in the question don’t serve this purpose:
B. clear: This command is typically used to clear certain settings or counters and is not related to changing configuration modes.
C. quit: While quit can sometimes exit a mode, it's more commonly used for exiting out of specific processes, but it doesn't always take you to the main configuration prompt.
D. exit: This command can also exit a mode, but it doesn't necessarily bring you back to the global configuration mode. It might exit a specific sub-mode, but not to the main configuration prompt.
In conclusion, the "end" command is the most direct and effective way to return to the main configuration prompt in Cisco devices.
Question No 10:
When in interface configuration mode on Cisco devices, which command allows you to return to the primary configuration prompt?
A. finish
B. reset
C. exit
D. terminate
Answer: A. finish
Explanation:
In Cisco networking devices, such as routers and switches, the command-line interface (CLI) provides a structured environment where configurations and management tasks are performed. These tasks can be carried out in various configuration modes that cater to specific functionalities. When you are in a particular mode, such as the interface configuration mode, you may need to move to a higher-level mode to make broader system-wide changes. To navigate through these modes, understanding the different commands available is essential.
The CLI on Cisco devices is organized into several distinct modes:
User EXEC Mode: This is the initial mode you access after logging into the device. It offers basic monitoring functionality and does not allow configuration changes.
Privileged EXEC Mode: This mode grants you more advanced capabilities, allowing you to execute system configuration and diagnostics commands. Access to this mode is typically granted by entering a password.
Global Configuration Mode: In this mode, you can make global system-wide configuration changes. It is the primary mode for configuring the overall device behavior.
Interface Configuration Mode: This is a sub-mode within the global configuration mode where you configure individual network interfaces, such as Ethernet ports or serial links. For instance, if you were configuring GigabitEthernet0/0, you would enter this sub-mode.
Now, when you are in the Interface Configuration Mode and wish to return to the Global Configuration Mode, the most appropriate command is "finish". This command immediately takes you out of the specific interface configuration mode and brings you back to the global configuration prompt. From there, you can either continue with other configurations or exit to the main command line.
It is important to note that while there are other commands for navigating in Cisco’s CLI, they serve different purposes:
B. reset: This command is often used to restart a specific process or clear settings, rather than changing your configuration mode.
C. exit: While this command can be used to exit a sub-mode, it does not always bring you directly to the global configuration mode. It may exit a specific sub-level configuration, but it could potentially leave you in a different mode, depending on where it is used.
D. terminate: This command is generally used to end a session or process but is not designed to change your configuration mode. It does not bring you back to the higher-level configuration modes like global configuration.
In conclusion, "finish" is the most direct and reliable command to exit the interface configuration mode and return to the global configuration prompt in Cisco devices.
