(ISC)2
SSCP · Question #841
Which xDSL flavour delivers both downstream and upstream speeds of 1.544 Mbps over two copper twisted pairs?
The correct answer is A. HDSL. High-rate Digital Subscriber Line (HDSL) delivers 1.544 Mbps of bandwidth each way over two copper twisted pairs. SDSL also delivers 1.544 Mbps but over a single copper twisted pair. ADSL and VDSL offer a higher bandwidth downstream than upstream.
Submitted by yaw92· Apr 18, 2026Network and Communications Security
Question
Which xDSL flavour delivers both downstream and upstream speeds of 1.544 Mbps over two copper twisted pairs?
Options
- AHDSL
- BSDSL
- CADSL
- DVDSL
How the community answered
(26 responses)- A88% (23)
- B4% (1)
- D8% (2)
Explanation
High-rate Digital Subscriber Line (HDSL) delivers 1.544 Mbps of bandwidth each way over two copper twisted pairs. SDSL also delivers 1.544 Mbps but over a single copper twisted pair. ADSL and VDSL offer a higher bandwidth downstream than upstream.
Topics
#xDSL#HDSL#Network Technologies#Broadband
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