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Choose the correct answer from the following statements about the Digital Subscriber Line (DSL)?

Robert Webster is known for his work associated with which one of the following?

Consider the following statements:
1. Symmetric Digital Subscriber Line (SDSL) is a collection of internet access technologies that offer symmetric upstream and downstream bandwidth.
2. Asymmetric Digital Subscriber Line (ADSL) provides greater bandwidth toward downstream than upstream.
Which of the statements given above is/are correct?

Which one of the following descriptions is correct?

Which one of the following descriptions is correct about the Asymmetric Digital Subscriber Line 2 plus (ADSL2+)?

Consider the following statements:
1. 5-Generation mobile telecommunication is approved and implemented by the International Telecommunication Union in 2012.
2. 5G mobile telecommunication system is originally launched on the CDMA standard.
Which of the statements given above is/are correct?

Which one of the following electromagnetic spectrum ranges is mainly used to transmit WiMAX signal? 

The microwaves region of the electromagnetic spectrum is ranges from 0.5 GHz to 300 GHz, then which one of the following ranges is commonly used in the telecommunication sectors?

Computer applications were classified by_____________.

Consider the following K-bands
1. K-band 
2. Ka-band
3. Ku-band