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Addressing IP v4 W.Lilakiatsakun Anatomy of IPv4 (1) Dotted Decimal Address Network Address Host Address Anatomy of IPv4 (2) Octet 32 Bit Address Binary to Decimal ... – PowerPoint PPT presentation

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1
• W.Lilakiatsakun

2
Anatomy of IPv4 (1)
3
Anatomy of IPv4 (2)
Octet
4
Binary to Decimal Conversion (1)
5
Binary to Decimal Conversion (2)
6
Decimal to Binary Conversion (1)
7
Decimal to Binary Conversion (2)
8
Decimal to Binary Conversion (3)
9
10
11
12
• 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
255.255.255.0
• Network bit the most 24 significant bits
• Host bit the least 8 significant bits

13
• Netmask can be represented as prefix (slash
format)
• The number of 1 is counted
• 255 1111 1111 (8 bits)
• We can find Network Address (Network ID) from IP

14
• 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

15
• Example IP address 192.168.10.20 /28
• 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 ?

16
17
• Network ID IP address that all host bits are
0s
• 192.168.10.20/24
• Network ID 192.168.10.0
1s
• 192.168.10.20/24

18
Different Prefixes (1)
19
Different Prefixes (2)
20
21
22
Quiz
23
Basic Subnetting (1)
24
Basic Subnetting (2)
25
Basic Subnetting (3)
26
Basic Subnetting (4)
27
Basic Subnetting (5)
28
Basic Subnetting (6)
29
VLSM (Subnetting a subnet)
30
Problem
• This scenario has the following requirements