·         CIDR – Classless Inter-Domain Routing.

·         Note: The Number of Class C networks must be contiguous.
Example. 192.168.0.0/22 represents the following block of addresses;
192.168.0.0, 192.168.1.0, 192.168.2.0 and 192.168.3.0.

 

Class C

 

 

 

CIDR Block

Supernet Mask

Number of Class Cs

Number of Hosts

/14

255.252.0.0

1024

262144

/15

255.254.0.0

512

131072

/16

255.255.0.0

256

65536

/17

255.255.128.0

128

32768

/18

255.255.192.0

64

16384

/19

255.255.224.0

32

8192

/20

255.255.240.0

16

4096

/21

255.255.248.0

8

2048

/22

255.255.252.0

4

1024

/23

255.255.254.0

2

512

/24

255.255.255.0

1

254

/25

255.255.255.128

1/2

126

/26

 

MR. B

255.255.255.192

1/4

62

 

 

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