Browse Definitions:

Quiz: DSL

DSL (Digital Subscriber Line) is a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines. Test your knowledge and find out if your brain cells are "always on".

How to take the quiz:
- After reading the question, click on the answer that you think is correct to go to the definition. If the answer you've chosen is correct, you will see the question text (exactly or approximately) somewhere in the definition.
- After reading the question, write down the letter of your answer choice on scrap paper. Check your answers by using the answer key at the end of the quiz.


1. This is the protocol used to "gather" DSL traffic from usersand forward it to a Digital Subscriber Line Access Multiplexer, which consolidates traffic across the backbone network.
a. forward DNS lookup
b. Transmission Control Protocol
c. Asynchronous Transfer Mode
d. Accelerated Hub Architecture

2. This form of DSL uses most of the channel to transmit downstream to the userand only a small part to receive information from the user.
a. VoIP
b. Asymmetric Digital Subscriber Line
d. cable modem

3. This trademarked version of DSL that is somewhat slower than ADSL but has the advantage that a "splitter" does not need to be installed at the user's end.
a. Unified Messaging
b. Consumer DSL
c. G.Lite
d. Netcaster

4. This device divides the incoming signal into low frequencies to send to voice devices, and high frequencies for data to the computer.
a. multicast router
b. interface device
c. sequencer
d. splitter

5. This is a network device, usually at a telephone company centraloffice, that receives signals from multiple customer DSL connections and puts the signals on a high-speed backbone line.
a. MBone
b. repeater
c. hub

6. This is the leading method of signal modulation for DSL servicein which the usable frequency range is separated into 256 frequency bands(or channels) of 4.3125KHz each.
a. pulse code modulation
b. Discrete Multitone
c. frequency-division multiplexing
d. Signaling System 7

7. This is a technology from US Robotics (now 3Com) for the downstream transmission of data over ordinary phone lines at 56 Kbps.
a. Y-modem
b. xDSL
c. Z-modem
d. x2

8. This term is used to describe multiple signals or streams of information sent at the same time in the form of a single, complex signal and then recovered as separate signals at the receiving end.
a. multicast
b. multilink bundle
c. multiplexing
d. multithreading

9. This type of DSL is used for wideband digital transmission within a corporate site and between the telephone company and a customer.It is symmetrical, meaning that an equal amount of bandwidth is available in both directions.
a. BAL
b. high bit-rate DSL
c. vBNS
d. wideband code-division multiple access

10. This was the original approach for modulation of a Digital Subscriber Line (DSL) signal.
a. carrierless amplitude/phase
b. pulse code modulation
c. quadrature amplitude modulation
d. phase-shift keying


See the rest of our quiz topics
Answer Key: 1c;2b;3b;4d;5d;6b;7d;8c;9b;10a
Learn more about Digital Subscriber Line (DSL) with our Fast Guide to DSL

This was last updated in April 2005

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.


File Extensions and File Formats

Powered by:


  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...


  • cloud ecosystem

    A cloud ecosystem is a complex system of interdependent components that all work together to enable cloud services.

  • cloud services

    Cloud services is an umbrella term that may refer to a variety of resources provided over the internet, or to professional ...

  • uncloud (de-cloud)

    The term uncloud describes the action or process of removing applications and data from a cloud computing platform.


  • federated identity management (FIM)

    Federated identity management (FIM) is an arrangement that can be made among multiple enterprises to let subscribers use the same...

  • cross-site scripting (XSS)

    Cross-site scripting (XSS) is a type of injection security attack in which an attacker injects data, such as a malicious script, ...

  • firewall

    In computing, a firewall is software or firmware that enforces a set of rules about what data packets will be allowed to enter or...




  • bad block

    A bad block is an area of storage media that is no longer reliable for storing and retrieving data because it has been physically...

  • all-flash array (AFA)

    An all-flash array (AFA), also known as a solid-state storage disk system, is an external storage array that uses only flash ...

  • volume manager

    A volume manager is software within an operating system (OS) that controls capacity allocation for storage arrays.


  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.