Which OSI layer is responsible for end-to-end communication and reliability?
Difficulty: Medium
About this MCQ
This Medium Computer Networks question asks: Which OSI layer is responsible for end-to-end communication and reliability? The correct choice is B. Transport Layer. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Computer Networks items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Computer Networks so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.
Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Computer Networks item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.
- A. Network Layer
Why not A: “Network Layer” does not fit this question. The answer is Transport Layer.
- B. Transport Layer ✓
- C. Session Layer
Why not C: “Session Layer” does not fit this question. The answer is Transport Layer.
- D. Application Layer
Why not D: “Application Layer” does not fit this question. The answer is Transport Layer.
Correct answer
B. Transport Layer
Explanation
Transport Layer is the term that matches “Which OSI layer is responsible for end-to-end communication and reliability” (option B). Option A (Network Layer) does not fit this question. Option C (Session Layer) does not fit this question. Option D (Application Layer) does not fit this question. For this Computer Networks question, the accepted answer is Transport Layer.
Source: OSI Reference Guide
Tags: networking, osi, transport
Submitted by: MCQsHub Editorial
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