Question

Which of this is not a constituent of residential telephone line?

(a) A high-speed downstream channel

(b) A medium-speed downstream channel

(c) A low-speed downstream channel

(d) An ultra-high speed downstream channel

I have been asked this question in exam.

Origin of the question is Access Networks topic in chapter Computer Networks Introduction of Computer Network

Answer 1

Correct option is (c) A low-speed downstream channel

Explanation: A low-speed downstream channel is not a constituent of a residential telephone line. But it might be just a two-way telephone channel. Internet can be provided through a high-speed downstream channel in a residential telephone line.