A company has recently implemented a video conference solution that uses the H.323 protocol. The security engineer is asked to make recommendations on how to secure video conferences to protect…

Question

Options

• AImplement H.235 extensions with DES to secure the audio and video transport.
• BRecommend moving to SIP and RTP as those protocols are inherently secure.
• CRecommend implementing G.711 for the audio channel and H.264 for the video.
• DEncapsulate the audio channel in the G.711 codec rather than the unsecured Speex.

• A
  73% (19)
• B
  15% (4)
• C
  8% (2)
• D
  4% (1)

Explanation

H.235 is the ITU-T security standard specifically designed as an extension to H.323 to provide authentication, integrity, and encryption for H.323 multimedia communications, including audio and video transport. It is the correct and purpose-built mechanism for securing H.323 sessions. Option B is incorrect because SIP and RTP are not inherently secure-RTP transmits media in cleartext by default and requires SRTP for encryption. Option C is wrong because G.711 and H.264 are audio and video codecs respectively; they handle encoding, not security. Option D is incorrect because switching between audio codecs (G.711 vs. Speex) provides no confidentiality protection. H.235 is the industry-standard answer for H.323 security.

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