ACtE08 · Chapter 8Demo2 · Set 2🏛️ Past Licensure QuestionID: b8d1276c
Which of the following is NOT a data-link or transport layer error detection mechanism?
Which of the following is NOT a data-link or transport layer error detection mechanism?
Multiple Choice Options
- A
Cyclic Redundancy Check (CRC)
- B
Internet Checksum
- C
Parity Check
- D✓ Correct Option
Sliding Window
Detailed Technical Solution & Explanation
In computer networking protocols:
•
CRC, Checksum, and Parity Check are mathematical error detection codes that append redundant verification bits to detect bit alterations caused by channel noise during transmission.
•
Sliding Window is a flow control and pipelined automatic repeat request (ARQ) error recovery protocol (used in TCP, Go-Back-N, and Selective Repeat) that manages sender transmit windows and receiver buffer boundaries. It does not perform bit-level error detection on payloads.
Option Analysis:
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Option A (CRC): Highly effective polynomial-based error detection algorithm.
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Option B (Checksum): 1's complement summation error detection algorithm used in IP/TCP/UDP headers.
•
Option C (Parity Check): Fundamental single-bit error detection scheme.
•
Option D (Sliding Window): Correct choice; sliding window is a flow control and transmission pacing mechanism, not an error detection algorithm.
Reference: Demo2 · Set 2NEC Licensure Syllabus