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Cisco Certification
100-490 Exam
Cisco.100-490.v2025-04-05.q61 Dumps

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Question 56

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

A.switch-to-switch
B.switch-to-router
C.switch-to-hub
D.router-to-router
E.switch-to-server

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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Question 57

Which Cisco CPAK 100GBASE module supports Multimode Fiber cable?

A.Cisco CPAK-100G-CWDM4
B.Cisco CPAK-100G-LR4
C.Cisco CPAK-100G-ER4L
D.Cisco CPAK-100G-SR4

Correct Answer: D

Section: Cisco Equipment and Related Hardware
Explanation/Reference: https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/ data_sheet_c78-728110.html

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Question 58

An Ethernet interface is up and the line protocol is down. What are two possible causes? (Choose two.)

A.There is a speed or duplex mismatch with the remote device.
B.There is a Layer 2 mismatch in the encapsulation type.
C.The Ethernet interface has been manually disabled.
D.Keepalives are not being received by the local device.
E.The Ethernet cable might not be attached properly.

Correct Answer: A,B

Section: Service-related Knowledge

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Question 59

What are the choices for modes of operation when deploying Cisco Catalyst 3850 Series switches?

A.Active mode and Standby mode
B.Install mode and Bundle mode
C.Boot mode and Run mode
D.Exec mode and User mode

Correct Answer: B

When deploying Cisco Catalyst 3850 Series switches, there are two modes of operation to choose from: Install mode and Bundle mode. Install mode is the default mode for the switch and uses a package-provisioning file named packages.conf to boot the switch. It allows for a more complete set of features and requires fewer resources upon boot1. Bundle mode, on the other hand, is similar to using traditional monolithic Cisco IOS images to boot the switch. It consumes more memory than Install mode because the packages are extracted from the bundle and copied to the RAM2. Cisco recommends using Install mode for operation due to its efficiency and feature set2.

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Question 60

Which command initiates the transfer of a Cisco IOS image over IP from ROMMON?

A.Xmodem
B.copy tftp: flash:
C.copy flash: tftp:
D.tftpdnld

Correct Answer: D

The tftpdnld command is specifically designed to initiate a TFTP (Trivial File Transfer Protocol) transfer of an image within ROMmon mode on a Cisco device. Here's why it's the correct answer:
ROMmon Functionality: ROMmon (Read-Only Memory Monitor) is a basic operating system mode used when the main Cisco IOS is unavailable. The tftpdnld command works from ROMmon to download a new IOS image.
TFTP Protocol: The tftpdnld command utilizes TFTP, which is a simple and reliable protocol commonly used for transferring Cisco IOS images.
Purpose: The command is used primarily for recovering corrupt images or upgrading to a different IOS version.
Why other options are incorrect:
Xmodem: XMODEM is an older and less reliable file transfer protocol that's less suitable than TFTP for Cisco IOS image transfers.
copy tftp: flash: This command format is used within the Cisco IOS itself, not in ROMmon mode.
copy flash: tftp: This command format would attempt to upload an image from flash memory to a TFTP server, instead of downloading an image.

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