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

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Question 16

Which two features are associated with single-mode fiber-optic cable? (Choose two.)

A.consists of a single strand of glass fiber
B.has higher attenuation that multimode fiber
C.carries a higher bandwidth that multimode fiber
D.costs less than multimode fiber
E.operates over less distance than multimode fiber

Correct Answer: A,C

The features associated with single-mode fiber-optic cable include:
Consists of a single strand of glass fiber: Single-mode fiber uses a single core (strand) of glass fiber to transmit light signals. This core is thinner than that of multimode fiber, allowing for greater transmission distances.
Carries a higher bandwidth than multimode fiber: Single-mode fiber can carry higher data rates over longer distances compared to multimode fiber. It is commonly used in long-haul communication links and high-speed networks.
Reference:
Single-mode vs. Multimode Fiber
Fiber Optic Cable Types

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Question 17

Which type of Cisco console cable is used to connect a laptop to the console port on a Cisco router?

A.fiber
B.crossover
C.straight-through
D.rollover

Correct Answer: D

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Question 18

From the enable mode, which command loads the configuration during the password recovery process on a Cisco router?

A.load_helper
B.configure terminal
C.copy running-config startup-config
D.copy startup-config running-config

Correct Answer: D

The copy startup-config running-config command is used during the password recovery process on a Cisco router to load the saved configuration into the device's active running configuration. Here's why this is the correct choice:
Password Recovery Context: Password recovery often involves booting into ROMmon mode and changing the configuration register to bypass the normal boot process. This leaves the device with a blank running configuration.
Restoring Configuration: The copy startup-config running-config command copies the stored configuration (startup-config) from NVRAM into the running-config, which is used by the router for its operations.
Why other options are incorrect:
load_helper: While the load_helper command sometimes appears in password recovery procedures, it's typically used for older models and may not be necessary for all Cisco routers.
configure terminal: This command simply enters global configuration mode. It doesn't directly load a configuration.
copy running-config startup-config: This command saves the active running configuration into NVRAM as the startup-config. It's the reverse of what you need for password recovery.

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Question 19

Which type of memory stores the decompressed form of Cisco IOS Software and the running configuration?

A.DRAM
B.NVRAM
C.flash
D.ROM

Correct Answer: A

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Question 20

Which two statements about a SmartJack are true? (Choose two.)

A.It provides signal conversion.
B.It acts as a concentration point for dial-in and dial-out connections.
C.It operates at Layer 2 of the OSI model.
D.It provides channel testing.
E.It regenerates the signal to compensate for signal degradation from line transmission.

Correct Answer: A,E

Section: Cisco Equipment and Related Hardware
Explanation

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