Protocols within the TCP/IP suite and products supporting TCP/IP networks are conceived as working at four layers. The four layers are Link/Network Interface, Internet, Transport, and Application.
In computer science, a protocol is a set of guidelines or instructions for transferring data between computers and other electronic devices. Information exchange between computers requires a prior agreement regarding the information's structure and the methods by which each side will send and receive it.
There are protocols for numerous applications. Examples include Internet communication, wireless networking, and wired networking (such as Ethernet and 802.11ac) (e.g., IP). There are numerous protocols in the Internet protocol suite, which is used to send data across the Internet.
Therefore, determining host interface addresses, encapsulating data into datagrams, and routing datagrams from a source host interface to a destination host interface across one or more IP networks are all tasks that fall under the purview of the Internet Protocol.
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