pronunciation - How paragraph numbers are read

I'd be glad if someone could tell me how numbers like "2.3.4.5.6" are read (pronounced)? "Two dot three dot four..." or "two three four" or maybe "two point three point four"?

Answer

The generally accepted and correct pronunciation of 2.3.4.5.6 would be:

Two point three point four point five point six.

The term point comes from full point as used as a punctuation mark or full stop. From Oxford English Dictionary (OED):

point, n.1

a. A full stop (in full, full point);