Specify whether each of the following statements is True or Ealse:

$15.$ In the TCP$/$IP model, the TCP segment is encapsulated within the session layer

PDU.

$16.$ In amplitude modulation, the modulated signal has double the bandwidth of the

modulating signal.

$17.$ If the error syndrome is $000$ it means that the original message can be $2-$bit

long, $3-$bit long, or $4-$bit long and has no errors.

$18.$ With the stop$-$and$-$wait ARQ, if the receiver receives two consecutive copies

of the same frame it means that an ACK frame was lost.

$19.$ The Stop$-$and$-$Wait ARQ performs well over a satellite link.

$20.$ In Hamming codes, an error syndrome of $10000000$ means that the error is in

a parity bit.