GCMP

Q: How deeply does Acing the CCNA Exam: Volume 2 Advanced Networking and Security cover GCMP?

Defines encryption, key lengths, integrity protection, and CCMP differences but does not cover configuration or verification procedures.

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

GCMP is a wireless data-protection protocol that combines AES counter-mode encryption with GMAC integrity protection.

GCMP protects wireless LAN data for WPA3 by combining AES counter-mode encryption with GMAC integrity protection. It improves on CCMP in security and efficiency for faster 802.11 data rates. section 20.3.3 section 20.5

Key implementation facts:

Uses AES counter mode for encryption, like CCMP. section 20.3.3
Supports 128-bit or 256-bit AES keys, whereas CCMP supports 128-bit keys. section 20.3.3
Uses GMAC as its data-integrity checksum, providing stronger integrity protection than earlier protocols. section 20.3.3 section 20.5

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

Cover of Acing the CCNA Exam: Volume 2 Advanced Networking and Security

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Related concepts

GMACuses · GMAC is an authentication-only construction based on Galois-field multiplication that produces an authentication tag for data.
counter mode encryptionuses · Counter mode encryption generates a keystream by encrypting successive counter values with a block cipher and combines it with plaintext to produce ciphertext.
CCMPalternative to · CCMP is an IEEE 802.11 wireless security protocol that combines AES counter-mode encryption with CBC-MAC-based message authentication.
WPA3used by · WPA3 is a Wi-Fi security standard that strengthens wireless authentication and encryption while improving resistance to password-guessing attacks.
AESuses · AES is a standardized symmetric block cipher that encrypts and decrypts data in 128-bit blocks using 128-, 192-, or 256-bit keys.

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.