CS601 GDB Solution & Discussion Fall 2011-2012

[Vuhelper]

Both TCP/IP model and OSI model work in a very similar fashion. But they do have very slight differences too. Knowing these differences is very important in learning computer networking. In your point of view which model is best regarding usage and why? Discuss it.”

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[Vuhelper]

OSI model was created by Advance research project agency (ARPA) but after the advent of the Internet, there arose the need for a streamlined protocol suite so the Defense Advanced Research Project Agency (DARPA) decided to create the TCP/IP protocol suite. Prior to discussing which model is best let’s have a comparison of both of these models TCP/IP Reference Model OSI Reference Model Defined after the advent of Internet Defined before advent of internet. Service interface and protocols were not clearly distinguished before Service interface and protocols are clearly distinguished. TCP/IP supports Internet working Internetworking not supported. Protocol Dependent standard Protocol independent standard. TCP reliably delivers packets, IP does not reliably deliver packets All packets are reliably delivered. The entire communication industry stands on the backbone of TCP/IP and OSI reference model. As for as we discuss which model is best it depends on what we are working with. In the networking field, the TCP/IP model is more relevant. However, in other computing fields such as programming, the OSI model would be better suited.