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100-490 Pack
Vendor: Cisco
Exam Code: 100-490
Exam Name: Supporting Cisco Routing & Switching Network Devices
Exam Questions: 72
Last Updated: December 2, 2025
Related Certifications:
Exam Tags: Entry Field Engineers
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Free Cisco 100-490 Exam Actual Questions

Question No. 1

Which device is a DTE device?

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Correct Answer: B

A DTE (Data Terminal Equipment) device is an end instrument that converts user information into signals or reconverts received signals. In the context of networking, a router can be considered a DTE device because it is typically at the user end of a user-network interface and serves as a data source or destination.It communicates with the data circuit-terminating equipment (DCE), such as a modem, to send and receive data across the network345.


Question No. 2

From a Windows command prompt, which command displays the local IP address of a computer?

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Correct Answer: C

The ipconfig command in Windows is used to display and manage network configuration information for the local computer. Here's what it shows:

IP Address: The IPv4 address assigned to each network adapter.

Subnet Mask: The subnet mask used to determine the network segment.

Default Gateway: The IP address of the router used to send traffic to other networks.

Other Information: DNS servers, DHCP server details, and more.

Incorrect options:

ipconfiguration: This is not a recognized command in the Windows command prompt.

ip configuration: This is also not a recognized command.

ip config: While it might seem like it should work, Windows uses ipconfig without spaces.

How to use ipconfig:

Open the Windows command prompt (Search for 'cmd')

Type ipconfig and press Enter.


Microsoft documentation on ipconfig: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/ipconfig

Question No. 3

Which command provides detailed information about the components that are installed on a router, such as the model, PID, and serial number?

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Correct Answer: C

The show inventory command in Cisco IOS is designed specifically to display detailed hardware inventory information about a Cisco device. This includes:

Component Name: The name or type of each module or card installed.

PID (Product ID): The unique product identifier for the module.

VID (Version ID): The version identifier for the module.

Serial Number: The unique serial number assigned to the module.

Why other options are incorrect:

show chassis: Some Cisco devices support a show chassis command, but the information provided usually focuses on the physical chassis rather than detailed component inventory.

show items: This is not a standard Cisco IOS command.

show router: This command doesn't provide the level of granular hardware information that show inventory does.

Topic 4, Service-related Knowledge


Question No. 4

Which two pieces of information about a neighboring device are displayed when you the CLI command show cdp neighbor? (Choose two.)

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Correct Answer: A, C

Theshow cdp neighborcommand on Cisco devices displays various pieces of information about directly connected neighboring devices that support Cisco Discovery Protocol (CDP).Two key pieces of information displayed by this command are theplatformof the neighboring device, which indicates the hardware type, and thedevice ID, which is typically the hostname of the device1. The command does not display the uptime or the Cisco IOS Software version; these details can be seen with theshow cdp neighbor detailcommand.The IP address is also part of the detailed information and not displayed in the standardshow cdp neighboroutput1.


Question No. 5

Which two pairs of LAN Ethernet devices use an RJ-45 straight-through cable? (Choose two.)

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Correct Answer: B, E

Questions no : 12 Verified Answer: = B. switch-to-router, E. switch-to-server

Switch-to-Router: A switch connects devices within a network by using MAC addresses to forward data to the correct destination. A router, on the other hand, connects multiple networks and uses IP addresses to determine the best path for the data packets. Connecting a switch to a router requires a straight-through cable because they are different types of devices12.

Switch-to-Server: Servers are the powerful computers that provide resources, data, services, or programs to the client machines in the network. When connecting a switch to a server, a straight-through cable is used because the switch and the server are different types of devices with different functions within the network12.


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