RCDD · Question #345
What is the frequency rating of an International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Category 7/Class F cable?
The correct answer is D. 600 MHz. ISO/IEC Category 7 (Class F) cable is rated for frequencies up to 600 MHz, placing it above Cat 6A (500 MHz) and below Cat 7A (1000 MHz).
Question
What is the frequency rating of an International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Category 7/Class F cable?
Options
- A100 MHz
- B250 MHz
- C500 MHz
- D600 MHz
- E1000 MHz
How the community answered
(25 responses)- A8% (2)
- C8% (2)
- D80% (20)
- E4% (1)
Why each option
ISO/IEC Category 7 (Class F) cable is rated for frequencies up to 600 MHz, placing it above Cat 6A (500 MHz) and below Cat 7A (1000 MHz).
100 MHz is the frequency rating for Category 5e cable, two full tiers below Category 7.
250 MHz is the frequency rating for Category 6 cable, not Category 7.
500 MHz is the frequency rating for Category 6A cable, one tier below Category 7.
ISO/IEC 11801 specifies Class F (Category 7) cable with a maximum frequency rating of 600 MHz. This rating supports high-bandwidth applications using fully shielded S/FTP construction and proprietary connectors such as GG45 or TERA. The 600 MHz ceiling is a key distinguishing characteristic of Cat 7 compared to all other common copper cable categories.
1000 MHz is the frequency rating for Category 7A (Class FA) cable, one tier above Category 7.
Concept tested: ISO/IEC copper cabling category frequency ratings
Source: https://www.iso.org/standard/61120.html
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