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Module 1: Physical Layer & Data Communication

20222m

Which layer of the TCP/IP stack corresponds to the OSI model transport layer?

(i) Host-to-host
(ii) Application
(iii) Internet
(iv) Network access

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Answer

(i) Host-to-host

Explanation

In the traditional TCP/IP model, the Host-to-Host (Transport) layer corresponds to the OSI Transport layer.

It provides process-to-process communication and can provide functions such as segmentation, flow control, error control, and reliable delivery through protocols such as TCP.

  • Application → broadly combines OSI Application, Presentation, and Session functions.
  • Host-to-host → corresponds to OSI Transport.
  • Internet → corresponds to OSI Network.
  • Network access → broadly covers OSI Data Link and Physical functions.

Final answer: (i) Host-to-host.

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