Network Services Slides Questions

Which Internet service type typically offers the fastest speeds?

• Fiber optic

• Cable

• DSL

• Wireless

• Satellite

Answer explanation

Fiber optic internet typically offers the fastest speeds due to its use of light signals, allowing for higher bandwidth and faster data transmission compared to cable, DSL, wireless, and satellite options.

The difference between an ISP offering Cable and an ISP offering Fiber is:

• Cable uses coaxial cables while Fiber uses fiber-optic cables.

• Cable is generally faster than Fiber.

• Fiber is more widely available than Cable.

• There is no difference between Cable and Fiber.

Answer explanation

The correct choice highlights that Cable uses coaxial cables, while Fiber utilizes fiber-optic cables. This distinction is crucial as it affects speed, reliability, and overall performance of the internet service.

What type of cable is used for DOCSIS?

• A) Fiber Optic

• B) Coaxial

• C) Ethernet

• D) USB

Answer explanation

DOCSIS (Data Over Cable Service Interface Specification) primarily uses coaxial cables to deliver high-speed internet over cable television systems. Therefore, the correct answer is B) Coaxial.

What does DOCSIS stand for?

• A) Data Over Cable Service Interface Specification

• B) Digital Over Cable System Interface Specification

• C) Data Over Coaxial Service Internet Specification

• D) Digital Over Coaxial System Internet Specification

Answer explanation

DOCSIS stands for Data Over Cable Service Interface Specification, which is the correct choice (A). It defines standards for data transmission over cable TV systems.

In a Cable/Coax connection, specific frequency ranges are reserved for ______.

• Cable TV and Internet

• Radio Broadcasting

• Mobile Communications

• Satellite TV

Answer explanation

In a Cable/Coax connection, specific frequency ranges are reserved for Cable TV and Internet services, allowing them to operate simultaneously without interference.

Which of the following statements is true about a modem?

• It amplifies the digital signals.

• It converts digital signals into analog signals and vice versa.

• It reduces the noise in analog signal.

• It converts AC current to DC current and vice versa.

Answer explanation

The correct statement is that a modem converts digital signals into analog signals and vice versa. This function is essential for enabling digital devices to communicate over analog communication lines.

What does a modem do?

• A) Converts digital signals into analog signals and vice versa.

• B) Converts analog signals into digital signals only.

• C) Converts digital signals into binary code.

• D) Converts analog signals into sound waves.

Answer explanation

A modem is essential for communication between digital devices and analog transmission systems. It converts digital signals from a computer into analog signals for transmission and vice versa, making option A the correct choice.

Fill in the blank: Ethernet is ______. At the lowest level, 0's and 1's are sent and received.

• digital

• analog

• binary

• optical

Answer explanation

Ethernet is digital because it transmits data in the form of 0's and 1's, which are binary representations. This distinguishes it from analog and optical methods, making 'digital' the correct choice.

What type of signaling is used in a home network?

• Electric signaling (Digital)

• Light signaling (Analog)

• Light signaling (Digital)

• Electric signaling (Analog)

Answer explanation

Home networks primarily use electric signaling in a digital format, allowing for efficient data transmission through cables and wireless connections. This makes 'Electric signaling (Digital)' the correct choice.

What does the modem do in a fiber network?

• A) Converts light to sound

• B) Modulates/demodulates from electric to light

• C) Converts digital to analog

• D) Amplifies signals

Answer explanation

In a fiber network, the modem modulates and demodulates signals, converting electrical signals to light for transmission and vice versa. Thus, the correct answer is B) Modulates/demodulates from electric to light.