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24-port NWay Ethernet Switch User’s Guide
74 Switch Management and Operating Concepts
unique number is assigned to each network and to each computer
within each network. This number is called the IP address.
IP addresses are written in a ‘dotted decimal’ notation to make
them easier to work with. Some examples follow:
1. 210.202.204.205
2. 189.21.241.56
3. 125.87.0.1
The four decimal (base 10) values in an IP address represent four
eight bit binary (base 2) numbers. A computer can only interpret
the binary numbers. The dots are simply visual separators, a
computer interprets an IP address as a series of 32 binary digits
(as a 32 bit number).
The same three IP address, from above, are written below in
binary form. The dots are retained for clarity.
1. 11010010.11001010.11001100.11001101
2. 10111101.00010101.11110001.00111000
3. 01111101.01010111.00000000.00000001
Note that in the third value of the third IP address, ‘0’ is
represented in binary form as ‘00000000’ and that the forth value,
‘1’ is represented in binary form as ‘00000001’.
Eight bit numbers are called a ‘byte’ or an ‘octet’. An octet can
represent any decimal value between ‘0’ (00000000) and ‘255’
(11111111). IP address values represented in decimal form have
four numbers ranging in value from ‘0’ to ‘255’. The maximum
range an IP address can have is then:
Lowest possible IP address - 0.0.0.0