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

To evaluate these statements, we must distinguish between the core transmission responsibilities of TCP and the security features provided by other layers. 1. Analyzing Assertion (A): Transmission Control Protocol (TCP) is a connection-oriented protocol designed for reliability. It breaks a byte stream into segments and assigns a sequence number to each. These numbers allow the receiver to detect missing segments and reassemble them in the exact order they were sent, even if they arrive out of sequence. Thus, Assertion (A) is correct. 2. Analyzing Reason (R): TCP was designed for connectivity and reliability, not security. It transmits data in "clear text," meaning it does not inherently provide confidentiality (encryption) or security. To ensure security, protocols like TLS (Transport Layer Security) or SSL are implemented on top of TCP. Therefore, Reason (R) is incorrect. 3. Final Logic: Since TCP successfully provides in-order delivery via sequence numbers but does not provide native encryption, the assertion is true while the reason is false.