ACtE08 · Chapter 8Mock Test 01🏛️ Past Licensure QuestionID: 45880394
What is the minimum header size of an IPv4 packet?
What is the minimum header size of an IPv4 packet?
Multiple Choice Options
- A
16 bytes
- B
10 bytes
- C✓ Correct Option
20 bytes
- D
32 bytes
Detailed Technical Solution & Explanation
An IPv4 header consists of at least 5 rows of 32 bits (4 bytes each) without optional parameters (options field length = 0), yielding a minimum header size of bytes. The maximum header size with options is 60 bytes.
Option Analysis:
•
Option A (16 bytes): Incorrect. IP headers require a minimum of 20 bytes.
•
Option B (10 bytes): Incorrect.
•
Option C (20 bytes): Correct. The standard minimum IPv4 header length (IHL = 5 words).
•
Option D (32 bytes): Incorrect.
Reference: Mock Test 01NEC Licensure Syllabus