Information about Lower Layer Protocol

as a college campus, industrial complex, or a military base. A CAN, may be considered a type of MAN (metropolitan area network), but is generally limited to an area that is smaller than a typical MAN.
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encapsulation is to include data from an upper layer protocol into a lower layer protocol. This is a method of abstraction for networking by allowing different layers to add features/functionality.
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In computer networking, the upper layer protocol (ULP) refers to the more abstract protocol when performing encapsulation. It contrasts with lower layer protocol which refers to the more specific protocol.
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The Internet protocol suite is the set of communications protocols that implement the protocol stack on which the Internet and most commercial networks run. It has also been referred to as the TCP/IP protocol suite, which is named after two of the most important protocols in it:
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Internet protocol may refer to:

• The Internet Protocol, a data-oriented protocol used for communicating data across a packet-switched internetwork
• The Internet protocol suite, a set of communications protocols that implement the protocol stack on which the Internet runs

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User Datagram Protocol (UDP) is one of the core protocols of the Internet protocol suite. Using UDP, programs on networked computers can send short messages sometimes known as datagrams (using Datagram Sockets) to one another.
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The Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite. TCP provides reliable, in-order delivery of a stream of bytes, making it suitable for applications like file transfer and e-mail.
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