What is the maximum IPv4 header length without options in bytes?

Study for the Internet Protocol Version 4 Test. Use flashcards and multiple-choice questions, each with hints and explanations. Master the exam with confidence!

Multiple Choice

What is the maximum IPv4 header length without options in bytes?

Explanation:
IPv4 header length is given by the IHL field, which counts 32‑bit words in the header. Each word is 4 bytes. The minimum IHL value is 5, which equals 5 × 4 = 20 bytes, representing the header with no options. Therefore, the maximum header length without options is 20 bytes. If options were present, the header could be larger—up to 60 bytes (15 words).

IPv4 header length is given by the IHL field, which counts 32‑bit words in the header. Each word is 4 bytes. The minimum IHL value is 5, which equals 5 × 4 = 20 bytes, representing the header with no options. Therefore, the maximum header length without options is 20 bytes. If options were present, the header could be larger—up to 60 bytes (15 words).

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