Question

Given below are two statements :
one is labelled as
Assertion (A) and the other is labelled as
Reason (R).
Assertion (A) :
TCP provides reliable, in-order delivery of data segments using sequence numbers.
Reason (R) :
TCP ensures security and confidentiality of transmitted data.
In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Think of TCP as a reliable postal service that makes sure your letters arrive in the right order. However, it doesn't "lock" the letters—for that, you need the "envelope" of TLS/SSL!

Answer 1

The Correct Option is C

Concept:
• TCP is a Transport Layer protocol designed for reliable communication.
• Security functions like encryption and authentication are typically handled by different protocols or layers.

Step 1: Verify Assertion (A)
As established in previous questions, TCP is famous for its "Reliable Byte Stream" service.
It uses sequence numbers, acknowledgments, and retransmissions to ensure data is received in order.
Thus, Assertion (A) is correct.

Step 2: Verify Reason (R)
Standard TCP sends data in plain text. It does not provide any encryption.
It does not ensure confidentiality (preventing eavesdropping) or data integrity against malicious tampering.
Security is provided by the TLS (Transport Layer Security) protocol, which runs on top of TCP (e.g., HTTPS = HTTP over TLS over TCP).
Thus, Reason (R) is incorrect.

Step 3: Final Choice
Since (A) is true but (R) is false, Option (C) is the correct answer.