Correct option is A
The
Transport Layer in the
OSI model is responsible for
end-to-end communication, error control, and flow control. In the
TCP/IP model, this functionality is provided by the
Host-to-Host Layer.
Important Key Points:
1.
TCP/IP Model vs. OSI Model Mapping:
·
OSI Model Transport Layer → TCP/IP Host-to-Host Layer
·
OSI Model Network Layer → TCP/IP Internet Layer
·
OSI Model Application, Presentation, and Session Layers → Combined into the TCP/IP Application Layer
2.
Functions of the Host-to-Host Layer in TCP/IP Model:
· Provides
end-to-end communication between devices.
· Uses
TCP (Transmission Control Protocol) for reliable communication.
· Uses
UDP (User Datagram Protocol) for fast, connectionless communication.
3.
TCP/IP Model vs. OSI Model Layer Comparison:
| OSI Model |
TCP/IP Model |
| Application |
Application |
| Presentation |
Application |
| Session |
Application |
| Transport |
Host-to-Host |
| Network |
Internet |
| Data Link |
Network Access |
| Physical |
Network Access |
· TCP ensures reliable, ordered, and error-checked delivery of data.
· UDP is used for applications requiring low latency (e.g., VoIP, video streaming).
· The Internet layer in TCP/IP is responsible for logical addressing (IP addresses).
· (b) Application → ❌ Incorrect: The Application Layer in TCP/IP corresponds to the Application, Presentation, and Session Layers in OSI, not the Transport Layer.
· (c) Internet → ❌ Incorrect: The Internet Layer in TCP/IP corresponds to the Network Layer in OSI, not the Transport Layer.
English
150 Questions
150 Marks
150 Mins
