Multiple choice networking osi-model

Which of the following are transport layer protocols?

  1. TCP and UDP

  2. ATM

  3. CISC

  4. HTTP and FTP
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A Correct answer
Explanation

The transport layer (Layer 4) provides end-to-end communication services. TCP and UDP are the primary transport layer protocols. ATM operates at the data link layer, CISC is a CPU architecture, and HTTP/FTP are application layer protocols.

AI explanation

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at the Transport layer (Layer 4) of the OSI/TCP-IP model, managing end-to-end communication, ports, and (for TCP) reliability/ordering. ATM is a data-link/network layer switching technology, CISC is a CPU instruction-set architecture unrelated to networking layers, and HTTP/FTP are Application layer (Layer 7) protocols that ride on top of TCP. So 'TCP and UDP' is the only correct transport-layer pairing.

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