Network - IPv4

About

IPv4

Example: 172.217.20.110

Syntax

Host Identifier

The host identifier of an IPv4 address is represented:

  • in the form nnn.nnn.nnn.nnn,
  • where nnn is a number from 0 to 255 (ie 8bit)

Example:

  • 192.168.1.10
  • 85.151.134.69)

An IPv4 address has a size of 32 bits (4×8 bit), which limits the total address space to 4 billion (<math>4294967296 = 2^{32}</math> ) addresses

_

Wildcard

The wildcard IP address 0.0.0.0 match any possible machine.

IPv4 vs IPv6

The main difference between IPv4 and IPv6 is the number of possible addresses. IPv6 was introduced in 1995 to ensure that the world would not run out anytime soon of IP number.

IP Version Bit Address Space Possible addresses
IPv4 32 4 billion
IPv6 128 <math>3.4 \times 10^{38}</math>

Packet

See packet

Documentation / Reference


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