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There are actually more than two protocols associated with Layer 4. According to Wikipedia, there are Transmission Control Protocol (TCP), User Datagram Protocol (UDP), Stream Control Transport Protocol (SCTP), Datagram Congestion Control Protocol (DCCP), and Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX).

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11y ago
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14y ago

There are more than two protocols at layer 4 for data transport; there is SPX and also TCP and UDP. These are the most common, and there are othres.

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15y ago

TCP and UDP

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Q: Which are the two protocols associated with layer 4 of the OSI model?
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