Addressing IP v4

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Addressing IP v4

• W.Lilakiatsakun

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Anatomy of IPv4 (1)
Dotted Decimal Address
Network Address
Host Address
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Anatomy of IPv4 (2)
Octet
32 Bit Address
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Binary to Decimal Conversion (1)
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Binary to Decimal Conversion (2)
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Decimal to Binary Conversion (1)
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Decimal to Binary Conversion (2)
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Decimal to Binary Conversion (3)
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Type of IPv4 Address-Network Address
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Type of IPv4 Address Broadcast Address
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Type of IPv4 Address Host Address
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Netmask (1)

• To identify the bit for the same position in the
  IP address whether it is Network bit or Host bit
• If the value of Netmask is
• 1 is the Network bit
• 0 is the Host bit
• Example IP address 192.168.10.10 Netmask-
  255.255.255.0
• Network bit the most 24 significant bits
• Host bit the least 8 significant bits

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Netmask (2)

• Netmask can be represented as prefix (slash
  format)
• The number of 1 is counted
• Netmask is 255.255.255.0 /24
• 255 1111 1111 (8 bits)
• We can find Network Address (Network ID) from IP
  Address
• Network Address IP adresss Netmask

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Netmask (3)

• Logic AND ()
• 0 0 0
• 0 1 0
• 1 0 0
• 1 1 1
• As a result,
• X 0 0
• X 1 X

• Logic OR ()
• 0 0 0
• 0 1 1
• 1 0 1
• 1 1 1
• As a result,
• X 1 1
• X 0 X

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Netmask (4)

• Example IP address 192.168.10.20 /28
• Network Address IP address Netmask
• 192.168.10.20 255.255.255.240
• 11000000 .10101000.00001010.00010100
• 11111111. 11111111.11111111.11110000
• 11000000 .10101000.00001010.00010000
• Question IP address 192.168.10.20 /22
• Network ID ?

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Netmask (5)
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Network Address Broadcast Address

• Network ID IP address that all host bits are
  0s
• 192.168.10.20/24
• Network ID 192.168.10.0
• Broadcast ID IP address that all host bits are
  1s
• 192.168.10.20/24
• Broadcast ID 192.168.10.255

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Different Prefixes (1)
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Different Prefixes (2)
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Assigning Addresses
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Calculating Addresses
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Quiz
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Basic Subnetting (1)
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Basic Subnetting (2)
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Basic Subnetting (3)
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Basic Subnetting (4)
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Basic Subnetting (5)
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Basic Subnetting (6)
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VLSM (Subnetting a subnet)
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Problem

• This scenario has the following requirements
• IP address 192.168.15.0/24
• AtlantaHQ 58 host addresses
• PerthHQ 26 host addresses
• SydneyHQ 10 host addresses
• CorpusHQ 10 host addresses
• WAN links 2 host addresses (3 Links)

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Answer
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