IPv4 header length can be extended up to how many bytes when IP options are present?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Enhance your skills with the GCIA Traffic Analysis Test. Prepare with insightful questions and detailed explanations. Excel in your exam!

Multiple Choice

IPv4 header length can be extended up to how many bytes when IP options are present?

Explanation:
IPv4 header length is determined by the IHL field, which counts the header in 32-bit words. Since IHL is a 4-bit value, it can specify 5 to 15 words. The fixed base header is 20 bytes (5 words); with the maximum 15 words, the total header length becomes 60 bytes. Therefore, when IP options are present, the header can extend up to 60 bytes in total (up to 40 bytes of options beyond the 20-byte base).

IPv4 header length is determined by the IHL field, which counts the header in 32-bit words. Since IHL is a 4-bit value, it can specify 5 to 15 words. The fixed base header is 20 bytes (5 words); with the maximum 15 words, the total header length becomes 60 bytes. Therefore, when IP options are present, the header can extend up to 60 bytes in total (up to 40 bytes of options beyond the 20-byte base).

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy