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In today’s era Network or Internet is used to send and receive data worldwide. As we know the network is a complex structure consisting of lots of computers and networking devices. The system which seeks data is known as the Client and the system which provides the data is known as Host . Also, we know that the TCP/IP and OSI models are the models which are used most. Both use layer architecture. Layer Architecture of TCP/IP and OSI Model Before transmission data moves between these layered architectures. Encapsulation and decapsulation are two processes used in this layered architecture. It’s like Boxing and Unboxing a real-world object for sent over courier. We can’t send any data directly on the internet. There are lots of things to do before transmission, like establish host to host communication, provides source and destination IP addresses etc. Fortunately, we as a user do not need to do any chores. The Network model does the credits. All we need to do is to just select