Q1. how is there numbers less than 200 in the third octet if the mask is /21

http://ccna.exampointers.com/sub.php

95.45.204.0 /21

Subnet Network First Usable IP Last Usable IP Broadcast

0 95.45.0.0 95.45.0.1 95.45.7.254 95.45.7.255

1 95.45.8.0 95.45.8.1 95.45.15.254 95.45.15.255

2 95.45.16.0 95.45.16.1 95.45.23.254 95.45.23.255

3 95.45.24.0 95.45.24.1 95.45.31.254 95.45.31.255

.

.

.

23 95.45.184.0 95.45.184.1 95.45.191.254 95.45.191.255

24 95.45.192.0 95.45.192.1 95.45.199.254 95.45.199.255

25 95.45.200.0 95.45.200.1 95.45.207.254 95.45.207.255 > i ONLY UNDERSTAND HOW TO GET THIS NOT THE SUBNETS BEFORE

Q2 CAN YOU PLEASE SHOW ME HOW THE BELOW VALUES CAN BE DESCRIBED/SHOWN/REPRESENTED WITH THE ABOVE DATA?? THANKS!!!

Number of Subnets:	8192
Number of IP:	2048