Internet Protocol version 4 (IPv4) is the fourth revision in the development of the internet Protocol (IP) and it is the first version of the protocol to be widely deployed. Together with IPv6, it is at the core of standards-based internetworking methods of the Internet. IPv4 is still by far the most widely deployed Internet Layer protocol. As of 2010[update], IPv6 deployment is still in its infancy.
IPv4 is described in IETF publication RFC 791 (September 1981), replacing an earlier definition (RFC 760, January 1980).
IPv4 is a connectionless protocol for use on packet-switched Link Layer networks (e.g., Ethernet). It operates on a best effort delivery model, in that it does not guarantee delivery, nor does it assure proper sequencing, or avoid duplicate delivery. These aspects, including data integrity, are addressed by an upper layer transport protocol (e.g., Transmission Control Protocol).
In.addr-arpa (ali66reza)
The address space of IPV4 is limited to 4294967296 possible unique addresses.
192.169.32.1
One major block of addresses reserved for special purposes is the IPv4 experimental address range 240.0.0.0 to 255.255.255.254. Currently, they cannot be used in IPv4 networks. However, these addresses could be used for research or experimentation.
IP addresses are divided into five IP classes:IP address class AIP address class BIP address class CIP address class DIP address class E
In IPv4, the loopback address is 127.0.0.1. In IPv6 it is ::1.
Octets
IPV6 is less vulnerable to DNS Spoofing IPv4 addresses use 32 bit or 4 bytes for addressing IPv6 addresses use eight bit segments.
To run the network every company purchase large amount of ip addresses. Large amount of ip addresses are used every day therefore IPV4 address system is going to end. So in future only ipv6 address will be used to fulfill the need of ip addresses.
When applying IPv4 addresses to router interfaces on a network, you would manually configure predictable addresses. For example, the lowest or highest address of the local subnet, on each particular router interface.
Understanding IPv4 addresses is crucial because they are fundamental to internet connectivity and communication. Each device on a network requires a unique IPv4 address to send and receive data, making it essential for routing traffic efficiently. Furthermore, knowledge of IPv4 helps in troubleshooting network issues and managing network security effectively. As the internet continues to grow, understanding IPv4 also lays the groundwork for transitioning to IPv6, which addresses the limitations of IPv4.
IPv4 addresses are 4 bytes. IPv6 IP addresses are 16 bytes.