Unbundling

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Instructor 's name

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UNBUNDLING

Introduction : definition and historical of unbundling

One of the most incredible features of TCP /IP has to do with the fact that the protocol is almost completely defined in terms of software TCP /IP is defined as the collection (or suite ) of networking protocols that have been used to construct the global Internet . The protocols are also referred to as the DoD (dee-oh-dee ) or Arpanet protocol suite because their early development was funded by the Advanced Research Projects Agency (ARPA ) of

the US Department of Defense (DoD (Oliver 2005 Paragraph 8 ) But in general sense and in wider usage the Transmission Control Protocol or TCP and the Internet Protocol or IP belongs to the category of Internet protocol suite which can be defined as set of implementation of communications protocols that is used for protocol stack . This protocol stack is the key functioning authority on which the activation and operation of most of the commercial networks and specifically internet depends to maneuver . The most widely used TCP /IP utilities or protocols are UNIX workstations . Other such TCP /IP utilities or protocols are Arp , Nslookup , Finger , Ping , Ftp , Rcp Hostname , Rexec , Ipconfig , Route , Lpq , Rsh , Lpr , Tftp , Nbtstat , Tracert and Netstat (Kar , 2006

In this protocol unlike almost anywhere else the physical amenities are kept intangible and thus abstract , such that all the information we so easily access over the Internet is completely independent from any form of hardware . It is this independence from a conventional infrastructure (which had until very recently been regarded as the primary requirement for any form of telecommunication based activity ) that has come to be known as unbundling

One will undoubtedly remember that in the very first stages of the development of the Internet the mini-computer provided the physical layer and the datalink the devoted line . Later when the computer started making use of the dial-up connection to connect to the Internet the physical layer was provided by the PC and the telephone line provided the dedicated connection . Thus we saw that the Internet can link such utterly different networks provided they are both able to send and accept TCP /IP packets

In PSTN 's (Public Switched Telephone Network ) circuit switching mode telephone lines were switched physically at the central level by telephone exchanges . This allowed the exchanges to continue to control both the physical and the other layers and to guarantee a bandwidth by creating a prior connection amongst the terminals . Hence , as we can see in such a case the protocols had to be coordinated for every layer in to ensure a connection between the various networks (Fletcher 2003

Unlike in such a connection the TCP /IP connection makes use of what is called a packet switching system where the data is put into a sort of packet and the packet submitted to a certain address simply by writing the address at which it needs to be posted in the header . In such a system there...