Cisco Certified Network Associate (CCNA) Practice Exam

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What is the maximum distance for the 1000BASE-CX cabling?

  1. 50 meters

  2. 25 meters

  3. 100 meters

  4. 75 meters

The correct answer is: 25 meters

The correct maximum distance for 1000BASE-CX cabling is 25 meters. This standard uses shielded twisted pair cabling, typically designed for short-distance connections, particularly in server rooms or data centers. The relatively short maximum distance helps maintain signal integrity at gigabit speeds, where interference and attenuation can be significant factors. The other options reflect maximum distances associated with different Ethernet standards. For example, 1000BASE-T, which utilizes twisted pair cabling, can support distances up to 100 meters. However, 1000BASE-CX is specifically limited to 25 meters due to its design and cabling characteristics.

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