What is IPv4?

Map Of Internet 1973


ipv4 is the IP at the version 4 because it has 4 bytes..



What is a IP Address? A Unique network IDentifier

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)



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



The wildcard IP address 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>


See packet

Documentation / Reference

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Firewalld - How to filter your traffic based on an IP, port or Region?

This page shows you how to filter your traffic based on a IP with firewalld rich rules. where: --permanent means that the rule will be used even after reboot. --add-rich-rule specifies the rich...
Map Of Internet 1973
How to use tracert, the traceroute utility?

tracert is an utility to trace a route: tracert on Windows traceroute on Linux With an Ipv4 address With an Ipv6 address
Mask Format
Network - (Network|Subnet) Mask

subnet mask is the second part of an Ip address. It's also called the mask of a subnet because all hosts on a subnet have the same network mask. The maximum size of the network is given by the number...
Map Of Internet 1973
Network - Address (Addressing)

IPv4 is the most common network addressing architecture used, though the use of IPv6 has been growing since 2006. A host is addressed by a node id A process is addressed by a node id and a port ...
Map Of Internet 1973
Network - DNS Lookup (Request|query)

A DNS lookup is a request to a DNS server in order to get DNS record from a DNS name a A query will get you a ipv4 address a AAAA query will get you the ipv6 address a TXT query will get your a...
Map Of Internet 1973
Network - Ip v6

This page talks the IP address with the IPv6 format. Below is an example of an Ipv6 address: The main difference between IPv4 and IPv6 is the number of possible addresses. IPv6 was introduced in...
Windows Qos
Network - Quality of Service (QoS)

Management of network bandwidth via QoS on Windows Two key QoS controls that are used to manage network traffic: DSCP value - Packet Priority (By default, Windows traffic has a DSCP value of 0.)...
URI - Host

URI In a uri, a host is a subcomponent of authority It's identified by: an IP literal encapsulated within square brackets, an IPv4 address in dotted-decimal form, or a registered name.
Dns Architecture
What is DNS ? The Domain Name System

The Domain Name System (DNS) is a database of name. It's naming system (service). It holds naming information for some kind of object (not only but mainly host) DNS can be seen as the phone book of...
What is Hosting? (or hosted domains for HTTP, Email, )

Hosting is when the domains of a request are not directly associated with the machine's name. The domains are then called hosted. web hosting is when a web/http server is provided to you. You...

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