Appendix E: Understanding IP and IP addressing 153

Figure 30 Subnet mask: class A

 

 

 

 

 

CLASS A subnet masks

 

 

Base_Tel-10

 

 

 

 

 

 

 

 

 

 

IPNETWRK

 

No. subnets

 

No. hosts

 

netmask

 

Netmask in binary format

 

subnet size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

4194302

255.192.0.0

 

(11111111.11000000.00000000.00000000)

2

 

 

 

6

2097150

255.224.0.0

 

(11111111.11100000.00000000.00000000)

3

 

 

 

14

1048574

255.240.0.0

 

(11111111.11110000.00000000.00000000)

4

 

 

 

30

524286

255.248.0.0

 

(11111111.11111000.00000000.00000000)

5

 

 

 

62

262142

255.252.0.0

 

(11111111.11111100.00000000.00000000)

6

 

 

 

126

131070

255.254.0.0

 

(11111111.11111110.00000000.00000000)

7

 

 

 

254

65534

255.255.0.0

 

(11111111.11111111.00000000.00000000)

8

 

 

 

510

32766

255.255.128.0

 

(11111111.11111111.10000000.00000000)

9

 

 

 

1022

16382

255.255.192.0

 

(11111111.11111111.11000000.00000000)

10

 

 

2046

8190

255.255.224.0

 

(11111111.11111111.11100000.00000000)

11

 

 

4094

4094

255.255.240.0

 

(11111111.11111111.11110000.00000000)

12

 

 

8190

2046

255.255.248.0

 

(11111111.11111111.11111000.00000000)

13

 

 

16382

1022

255.255.252.0

 

(11111111.11111111.11111100.00000000)

14

 

 

32766

510

255.255.254.0

 

(11111111.11111111.11111110.00000000)

15

 

 

65534

254

255.255.255.0

 

(11111111.11111111.11111111.00000000)

16

 

 

131070

126

255.255.255.128

(11111111.11111111.11111111.10000000)

17

 

 

262142

62

255.255.255.192

(11111111.11111111.11111111.11000000)

18

 

 

524286

30

255.255.255.224

(11111111.11111111.11111111.11100000)

19

 

 

1048574

14

255.255.255.240

(11111111.11111111.11111111.11110000)

20

 

 

2097150

6

255.255.255.248

(11111111.11111111.11111111.11111000)

21

 

 

4194302

2

255.255.255.252

(11111111.11111111.11111111.11111100)

22

 

 

 

 

 

 

Host/Router

 

 

 

 

DMS

Note: The CORWAN (Nortel LAN network 47.XX.XX.XX) is a class A network with a 12 bit subnet.

DMS-100 Family EIU User Guide TELECOM12

Page 153
Image 153
Cabletron Systems DMS-100 manual Subnet mask class a Class a subnet masks