What is the difference between amplifier and repeater?
it is tempting to compare a repeater to an amplifier, but the
comparision is inaccurate. according to Forouzan, an amplifier
cannot discriminate between the intended signal and noise; it
amplifies equally everything fed into it. a repeater does not
amplify the signal; it regenerates the signal. when it receives a
weakened or corrupted signal, it creates a copy, bit for bit, at
the original strength.
a repeater is a regenerator; not an amplifier
a repeater forwards every bit; it has no filtering capability
a repeater connects segments of a LAN