It is the layer which holds the whole architecture together. It is very useful in situations like bank transactions. This may include some basic network support services such as protocols for routing and host configuration. Real-world needs for firewalls, network address translators, web content caches and the like have forced changes in this principle.
It provides a uniform networking interface that hides the actual topology layout of the underlying network connections. OSI uses different session and presentation layers. Both have layers of inter network, transport and application, but the other layers are different.
Despite these fundamental similarities between the two models, there are also many differences. Protocols are set of rules which govern every possible communication over a network. IP Internet Protocol is used in this layer.
The overall idea was to allow one application on one computer to talk to send data packets another application running on different computer.
For many types of services, these port numbers have been standardized so that client computers may address specific services of a server computer without the involvement of service announcements or directory services. These layers form the transport provider.
It is used to synchronize the clocks on our computer to one standard time source. The Internet Protocol standard dictates the logistics of packets sent out over networks; it tells packets where to go and how to get there.