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CISSP · Question #622

The Secure Shell (SSH) version 2 protocol supports.

The correct answer is D. authentication, compression, confidentiality, and integrity.. SSH version 2 is a secure protocol that provides authentication, compression, confidentiality, and integrity for remote connections. Understanding its supported features is essential for network security certification exams.

Submitted by katya_ua· Mar 5, 2026Communication and Network Security

Question

The Secure Shell (SSH) version 2 protocol supports.

Options

  • Aavailability, accountability, compression, and integrity,
  • Bauthentication, availability, confidentiality, and integrity.
  • Caccountability, compression, confidentiality, and integrity.
  • Dauthentication, compression, confidentiality, and integrity.

How the community answered

(64 responses)
  • A
    5% (3)
  • B
    2% (1)
  • C
    2% (1)
  • D
    92% (59)

Why each option

SSH version 2 is a secure protocol that provides authentication, compression, confidentiality, and integrity for remote connections. Understanding its supported features is essential for network security certification exams.

Aavailability, accountability, compression, and integrity,

Availability is not a feature provided by the SSH protocol itself; SSH does not include mechanisms to ensure service uptime or redundancy, and 'accountability' is not a defined SSHv2 feature.

Bauthentication, availability, confidentiality, and integrity.

While authentication and integrity are correct SSHv2 features, 'availability' is not provided by SSH - SSH has no built-in mechanisms to guarantee service availability or uptime.

Caccountability, compression, confidentiality, and integrity.

Accountability is not a feature of SSHv2; SSH does not natively provide audit logging or non-repudiation services, and 'availability' is also absent from SSHv2's defined capabilities.

Dauthentication, compression, confidentiality, and integrity.Correct

SSH version 2 supports authentication (verifying user/host identity via public keys or passwords), compression (optional data compression to reduce bandwidth), confidentiality (encryption of data in transit using algorithms like AES), and integrity (using MACs such as HMAC-SHA2 to ensure data has not been tampered with). These four features are the core pillars of the SSHv2 protocol as defined in RFC 4251-4254.

Concept tested: SSH version 2 protocol supported security features

Source: https://www.rfc-editor.org/rfc/rfc4251

Topics

#SSHv2#Confidentiality#Integrity#Authentication

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