The telecom ISMS guide TR 27015 has identical text published as ITU-T X.1051 and which ISO/IEC standard?

The telecom ISMS guide TR 27015 has identical text published as ITU-T X.1051 and which ISO/IEC standard?

• A. ISO/IEC 27011
• B. ISO/IEC 27016
• C. ISO/IEC 27015
• D. ISO/IEC 27019

Answer: (A)

Telecom sector-specific information security management is the focus here. ISO/IEC 27011 is the standard that provides information security guidance tailored for telecommunications organizations, built to align with the general ISO/IEC 27001 family and with ITU-T’s telecom security practices. Because TR 27015, ITU-T X.1051, and ISO/IEC 27011 were harmonized so the same content appears across the ITU-T and ISO/IEC documents, their text is identical. The other options address different contexts or are not the telecom-specific extension, so they aren’t the source of that identical text.

Telecom sector-specific information security management is the focus here. ISO/IEC 27011 is the standard that provides information security guidance tailored for telecommunications organizations, built to align with the general ISO/IEC 27001 family and with ITU-T’s telecom security practices. Because TR 27015, ITU-T X.1051, and ISO/IEC 27011 were harmonized so the same content appears across the ITU-T and ISO/IEC documents, their text is identical. The other options address different contexts or are not the telecom-specific extension, so they aren’t the source of that identical text.