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Class A Private IP Address Range
10.0.0.0 through 10.25.255.255
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Class B Private IP Address Range
172.16.0.0 through 172.31.255.255
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Class C Private IP Address Range
192.168.0.0 through 192.168.255.255
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Class A First Bit Value (binary)
0
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Class B First Bit Value (Binary)
10
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Class C First Bit Value (Binary)
110
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Class A: Number of network id bits
8
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Class B: Number of network id bits
16
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Class C: Number of network id bits
24
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Class A: Number of host id bits
24
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Class B: Number of host id bits
16
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Class C: Number of host id bits
8
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Class A: Number of networks
126
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Class B: Number of networks
16,384
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Class C: Number of Networks
2,097,152
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Class A: Number of hosts
16,777,214
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Class B: Number of hosts
65,534
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Class C: Number of hosts
254
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Class A: Subnet mask
255.0.0.0
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Class B: Subnet mask
255.255.0.0
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Class C: Subnet mask
255.255.255.0
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Formula to determine the # of possible addresses with a given # of bits
2^X -2
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Why are two bits of a IP address reserved?
- 1 bit: Broadcast address
- 1 bit: Network Address
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Network Address (Binary)
000.000.000.000
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Broadcast Address (Binary)
111.111.111.111
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Class D addresses are for...
multicasts
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Class E addresses are:
experimental
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