Net Mask

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 Netmask Netmask (binary) CIDR Notes 255.255.255.255 11111111.11111111.11111111.11111111 /32 Host (single addr) 255.255.255.254 11111111.11111111.11111111.1111111 /31 !n"sable 255.255.255.252 11111111.11111111.11111111.111111 /3 2 "sable 255.255.255.24# 11111111.11111111.11111111.11111 /2$ % "sable 255.255.255.24 11111111.11111111.11111111.1111 /2# 14 "sable 255.255.255.224 11111111.11111111.11111111.111 /2& 3 "sable 255.255.255.1$2 11111111.11111111.11111111.11 /2% %2 "sable 255.255.255.12# 11111111.11111111.11111111.1 /25 12% "sable 255.255.255. 11111111.11111111.11111111. /24 'Class C' 254 "sable 255.255.254. 11111111.11111111.1111111. /23 2 Class Cs 255.255.252. 11111111.11111111.111111. /22 4 Class Cs 255.255.24#. 11111111.11111111.11111. /21 # Class Cs 255.255.24. 11111111.11111111.1111. /2 1% Class Cs 255.255.224. 11111111.11111111.111. /1$ 32 Class Cs 255.255.1$2. 11111111.11111111.11 . /1# %4 Class Cs 255.255.12#. 11111111.11111111.1 . /1& 12# Class Cs 255.255.. 11111111.11111111.. /1% 'Class '  255.254.. 11111111.1111111. . /15 2 Class s 255.252.. 11111111.111111.. /14 4 Class s 255.24#.. 11111111.11111. . /13 # Class s 255.24.. 11111111.1111. . /12 1% Class s 255.224.. 11111111.111. . /11 32 Class s 255.1$2.. 11111111.11.. /1 %4 Class s 255.12#.. 11111111.1 . . /$ 12# Class s 255... 11111111. . . /# 'Class *' 254... 1111111... /& 252... 111111. . . /% 24#... 11111. . . /5 24... 1111. . . /4 'Class +' (,"lti-ast and resered) 224... 111. . . /3 1$2... 11. . . /2 12#... 1. . . /1 ... . . . / I s0a-e Net bits Subnet mask total-addresses per subnet /20 255.255.240.0 4096 /21 255.255.248.0 2048 /22 255.255.252.0 1024 /23 255.255.254.0 512 /24 255.255.255.0 256 /25 255.255.255.128 128 /26 255.25 5.255.192 64 /27 255.25 5.255.224 32 /28 255.25 5.255.240 16 /29 255.255.255.248 8 /30 255.255.255.252 4

description

sdf

Transcript of Net Mask

Netmask Netmask (binary) CIDR Notes

Netmask Netmask (binary) CIDR Notes

255.255.255.255 11111111.11111111.11111111.11111111 /32 Host (single addr)

255.255.255.254 11111111.11111111.11111111.11111110 /31 Unusable

255.255.255.252 11111111.11111111.11111111.11111100 /30 2 usable

255.255.255.248 11111111.11111111.11111111.11111000 /29 6 usable

255.255.255.240 11111111.11111111.11111111.11110000 /28 14 usable

255.255.255.224 11111111.11111111.11111111.11100000 /27 30 usable

255.255.255.192 11111111.11111111.11111111.11000000 /26 62 usable

255.255.255.128 11111111.11111111.11111111.10000000 /25 126 usable

255.255.255.0 11111111.11111111.11111111.00000000 /24 "Class C" 254 usable

255.255.254.0 11111111.11111111.11111110.00000000 /23 2 Class C's

255.255.252.0 11111111.11111111.11111100.00000000 /22 4 Class C's

255.255.248.0 11111111.11111111.11111000.00000000 /21 8 Class C's

255.255.240.0 11111111.11111111.11110000.00000000 /20 16 Class C's

255.255.224.0 11111111.11111111.11100000.00000000 /19 32 Class C's

255.255.192.0 11111111.11111111.11000000.00000000 /18 64 Class C's

255.255.128.0 11111111.11111111.10000000.00000000 /17 128 Class C's

255.255.0.0 11111111.11111111.00000000.00000000 /16 "Class B"

255.254.0.0 11111111.11111110.00000000.00000000 /15 2 Class B's

255.252.0.0 11111111.11111100.00000000.00000000 /14 4 Class B's

255.248.0.0 11111111.11111000.00000000.00000000 /13 8 Class B's

255.240.0.0 11111111.11110000.00000000.00000000 /12 16 Class B's

255.224.0.0 11111111.11100000.00000000.00000000 /11 32 Class B's

255.192.0.0 11111111.11000000.00000000.00000000 /10 64 Class B's

255.128.0.0 11111111.10000000.00000000.00000000 /9 128 Class B's

255.0.0.0 11111111.00000000.00000000.00000000 /8 "Class A"

254.0.0.0 11111110.00000000.00000000.00000000 /7

252.0.0.0 11111100.00000000.00000000.00000000 /6

248.0.0.0 11111000.00000000.00000000.00000000 /5

240.0.0.0 11110000.00000000.00000000.00000000 /4 "Class E" (Multicast and reserved)

224.0.0.0 11100000.00000000.00000000.00000000 /3

192.0.0.0 11000000.00000000.00000000.00000000 /2

128.0.0.0 10000000.00000000.00000000.00000000 /1

0.0.0.0 00000000.00000000.00000000.00000000 /0 IP space

Net bits Subnet mask total-addresses per subnet

/20 255.255.240.0 4096

/21 255.255.248.0 2048

/22 255.255.252.0 1024

/23 255.255.254.0 512

/24 255.255.255.0 256

/25 255.255.255.128 128

/26 255.255.255.192 64

/27 255.255.255.224 32

/28 255.255.255.240 16

/29 255.255.255.248 8

/30 255.255.255.252 4