User will get information on NS-3
Bandwidth (Terminology wrt user): Maximum data rate experienced by user. Its a fixed entity. Its is controlled by ISP.
Bandwidth (Terminology wrt Cable): maximum data rate that can be passed through cable without any error. its a fixed entity.
Speed: Speed of data is nothing but speed of signal. Its either electrical, optical or electromagnetic waves. Their speed remain same(Approx. 2.8 X 10^8 m/s) . its a fixed entity.
Data-rate: its like regulator of data flow. Regulator is placed either (1) client side (User Side-Placed at Transport layer) (2) Internet service provider side (to limit flow f data as per user's plan purchased-Placed at network layer) (3) at server side (looking at the network capacity-Place at Transport Layer)