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Question 49 - 100-490 discussion

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

A.

It provides signal conversion.

Answers
A.

It provides signal conversion.

B.

It acts as a concentration point for dial-in and dial-out connections.

Answers
B.

It acts as a concentration point for dial-in and dial-out connections.

C.

It operates at Layer 2 of the OSI model.

Answers
C.

It operates at Layer 2 of the OSI model.

D.

It provides channel testing.

Answers
D.

It provides channel testing.

E.

It regenerates the signal to compensate for signal degradation from line transmission.

Answers
E.

It regenerates the signal to compensate for signal degradation from line transmission.

Suggested answer: A, E

Explanation:

SmartJacks are specialized devices used in telecommunications, particularly for T1/E1 lines. Here's why the correct answers make sense:

Signal Conversion: SmartJacks can convert between different signaling types (e.g., AMI to B8ZS). This is necessary because different telecommunication lines may use varying signaling standards.exclamation

Signal Regeneration: As signals travel over long distances, they can weaken and degrade.expand_more SmartJacks help regenerate the signal, ensuring that it maintains its strength and integrity throughout the transmission.expand_more

Why other options are incorrect:

Concentration point: SmartJacks are not primarily used as concentration points for dial-in/out connections.exclamation This function is typically handled by modems or other specialized devices.exclamation

Layer 2 operation: SmartJacks primarily operate at Layer 1 (Physical Layer) of the OSI model, focusing on the physical transmission of signals.

Channel Testing: While some SmartJacks may offer some basic channel testing capabilities, their primary functions are signal conversion and regeneration.

SmartJack (Wikipedia): https://en.wikipedia.org/wiki/Smartjack

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asked 07/10/2024
João Faria
36 questions
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