This is a tribute to its initial design. The initial design did not anticipate the exponential growth of the Internet. IPPP provides the world with only 4 billion IP addresses. As a result it was predicted that in within first decade of the 21st century Pop addresses will be exhausted. Therefore Internet Engineering Task Force (IETF) prepared to address the perceived problems in 1993, as a result IPPP came to play. Primary goal of new approach is to deal with exhaustion of the current, IPPP address space.
It arose out of an evaluation and design process that began in 1990 and considered a number of options and a range of different protocol alternatives. The design process was almost completed according to the evaluations by the first half of 1995, although refinement work continues . The current version of the specification was published, after considerable implementation experience had been obtained, at the end of 1998. But Controversy continues to this day about some of the choices made, but there are no proposals for alternatives that are complete enough for a determination to be made about whether or not they are realistic.
Even though the principal motivation of the approach to find out a way to solve the problem of address space issue number of other changes also made in format and interpretation of data fields. Those changes are intended to make the network operate better in the long term and transition more complex than it would have been with address space expansion alone. Therefore some communities have strongly argued different approach would have been taken to overcome the address resolution issue rather than making process more complicated. 2. 0 Brief Introduction on Pop IPPP is the most widely used version of internet protocol.
Pop addresses are represented in dotted-decimal format. This 32-bit address is divided along 8-bit mandarins. Each set of 8 bits is converted to its decimal equivalent and separated by periods. Each of digit section can include a number from O to 255. Therefore total number of addresses available is 256 * 256* 256*256. By the original design IPPP is a connectionless protocol for use on packet-switched networks. It 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). Each computer or device connected to the Internet must have a unique IP address in order to communicate with other systems on the Internet. Because the number of systems connected to the Internet is quickly approaching the number of available IP addresses, IPPP addresses are predicted to run out soon. This is not a surprise when considering over 6 billion people are in the world even though all of them are not connected most of the people have more than one devices connected to internet. . 0 Pop Address Space 3. 1 Structure of Pop Brief structural representation on Pop packet format (Figure 1). Figure 1 : Structural representation on Pop Header * Version: 4 bits * The Version field indicates the format of the internet header. Bits * Internet Header Length is the length of the internet header in 32 bit words, and thus points to the beginning of the data. * Type of Service: 8 bits * The Type of Service provides an indication of the abstract parameters of the quality of service desired. * Total Length: 16 bits * Total Length is the length of the datagram, measured in octets, including internet header and data.