IPV4 Addressing Scheme – (PART 1) – Introduction
In this video lecture I will be giving you a brief introduction to the popular Internet Protocol version 4 (IPv4) addressing scheme. This is the first part of the specific topic IPV4 addressing, further discussion will be continuing in subsequent parts.
IPV4 is the fourth version of the Internet Protocol (IP). The Internet Protocol is the protocol that defines and enables inter-networking at the internet layer of the Internet Protocol Suite. In essence it forms the Internet. It uses a logical addressing system and performs routing, which is the forwarding of packets from a source host to the next router that is one hop closer to the intended destination host on another network.
IPv4 is a connectionless protocol, and operates on a best effort delivery model, in that it does not guarantee delivery, nor does it assure proper sequencing or avoidance of duplicate delivery. These aspects, including data integrity, are addressed by an upper layer transport protocol, such as the Transmission Control Protocol (TCP).
IPv4 was the first version deployed for production in the ARPANET in 1983. It still routes most Internet traffic today, despite the ongoing deployment of a successor protocol, IPv6. IPv4 is described in IETF publication RFC 791 (September 1981).
IPv4 uses a 32-bit address space, which limits the number of unique hosts to 4,294,967,296 (232), but large blocks are reserved for special networking methods, mainly private networks (~18 million addresses) and multicast addresses (~270 million addresses). IPv4 addresses may be represented in any notation expressing a 32-bit integer value. They are most often written in dot-decimal notation, which consists of four octets of the address expressed individually in decimal numbers and separated by periods.
ipv4
