@eug - since you are asking questions about Fibe 25 and other Bell internet services, you might try the "Bell High Speed Internet" thread. That thread might have specific answers about the data side of things.
With Fibe TV you get a Alacatel Lucent Cellpipe 7130 which supports VDSL2 (Wikipedia has a very good explanation of VDSL2 vs ADSL2)
IP over coax uses HPNA - again, wikipedia has a good explanation.