Test yourself - Take a quiz!

Here is is an opportunity  to see what you've really learnt reading the site.
Below is a short quiz covering some of the elements presented on the site.  Chose the correct answer out of the 4 answers listed for each question. 
When you're done, press the 'Submit' button.  The quiz will then be checked and you will be presented with the mistakes (if there are any) you have done.
If you want to start over, you can press the 'Reset' button anytime during and after the quiz is done.

 Question1: What is the modulation technique(s) that can be used for ADSL?

   1. CAP/QAM
   2. DMT
   3. Both
   4. None of the above

 Question2: 1. How many frames in an ADSL superframe?

   1. 69 with the sync frame
   2. 68 with the sync frame
   3. 53 with the sync frame
   4. 48 with the sync frame

 Question3: What is the ATU-C?

   1. Low pass filter
   2. DSL access multiplexer
   3. The transceiver at the central office
   4. The transceiver at the costumer premises

 Question4: What makes the ADSL asymmetric?

   1. Different data rates - Downstream is bigger than Upstream
   2. Different data rates - Upstream is bigger than Downstream
   3. Download and Upload can't occur simultaneously
   4. None of the above

 Question5: How many splitters do we use in the ADSL architecture and where?

   1. Two. Both in the central office.
   2. One. In the central office.
   3. One. In the subscriber premises.
   4. Two. One in the central office and the other in the subscriber premises.

 Question6: say there is a customer living 5000ft from the CO, who agree to pay extra money for HDTV services.  What line connection should we give him?

   1. ADSL
   2. RE-ADSL2
   3. Bonded ADSL2+ with 2 lines.
   4. He would do just fine with 56k modem

 Question7: Say the customer from the previous question got older, and decided to move to the country side 18,000ft from the CO.  He doesn't need HDTV anymore, he has already seen it all, but he just can't do without his daily websites.  What would be the best line configuration for him?

   1. ADSL
   2. VDSL
   3. ADSL2/2+
   4. RE-ADSL2

Question8:  What is SRA?
   1. "Sound Rack Audio" - digital audio transmission over DSL
   2. "Seamless Rate Adaptation" - an ADSL2 mechanism to adapt a new rate in
                           an existing connection without restarting and invisibly from the end systems.
   3. "Seek And Rescue" - packet recovering in ADSL2
   4. Its an organization who standardize ADSL

 Question9:  How can ADSL2+ reduce crosstalk?

   1. By masking downstream frequencies below 1.1Mhz to 1.1-2.2Mhz
   2. By using rate adaptation
   3. By using special binders
   4. It can't reduce crosstalk, only AM radio band interferences

 Question10: The difference(s) between VDSL and ADSL are

   1. VDSL can be both symmetric and asymmetric
   2. ADSL operates over regular POTS, while VDSL can't
   3. VDSL provide faster data transmission over shorter distances then ADSL
   4. 1 and 3 are correct