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Difficulty: MediumPhysical Interface and Cabling Types

Match each physical network cabling or interface standard on the left with its corresponding physical characteristic or specification on the right.

  • Single-Mode Fiber (SMF) OS2Uses a 9 µm core diameter designed for long-haul transmission without modal dispersion.
  • Multimode Fiber (MMF) OM3Uses a 50 µm laser-optimized core diameter supporting 10 Gbps up to 300 meters.
  • Category 6 UTP (10GBASE-T)Supports 10 Gbps Ethernet over unshielded copper up to a maximum distance of 55 meters.
  • Rollover CableReverses pin connections on opposite ends to connect a computer serial port to a switch console port.

Answer

Single-Mode Fiber (SMF) OS2 matches the 9 µm core diameter specification for long-haul links; Multimode Fiber (MMF) OM3 matches the 50 µm core supporting 10 Gbps up to 300 m; Category 6 UTP (10GBASE-T) matches 10 Gbps support up to 55 m; Rollover Cable matches reversing pin connections for console access.
Each physical media type has distinct physical properties: Single-Mode Fiber (OS2) uses a 9 µm core to eliminate modal dispersion over long distances; Multimode Fiber (OM3) uses a laser-optimized 50 µm core to achieve 10 Gbps over 300 m; Category 6 UTP supports 10 Gbps up to 55 m; and Rollover Cable completely flips the pin connections (pin 1 to pin 8) for out-of-band console access.

Step-by-Step Solution

1
Analyze Single-Mode Fiber (SMF) OS2 characteristics.
Identify that SMF features a small 9 µm core for long-range links with zero modal dispersion.
SMF core size allows only one mode of light propagation, enabling distances of 10 km or more.
2
Analyze Multimode Fiber (MMF) OM3 characteristics.
Identify that OM3 fiber uses a laser-optimized 50 µm core rated for 10 Gbps up to 300 meters.
OM3 fiber is engineered for 850 nm VCSEL lasers to extend 10G reach beyond older OM1/OM2 fibers.
3
Evaluate Category 6 UTP copper constraints for 10GBASE-T.
Match Category 6 UTP to 10 Gbps transmission capped at 55 meters.
Category 6 UTP can support 10 Gbps up to 55 meters, whereas Category 6A extends this reach to 100 meters.
4
Identify the purpose and pinout structure of a Rollover Cable.
Match Rollover Cable to reversing pin connections for switch console management.
Rollover cables flip all 8 pins (pin 1 to 8, 2 to 7) to map DB-9/USB serial adapters to RJ-45 Cisco console ports.

Key Concept

Physical interface cabling specifications, core diameters, distance limits, and pinout roles in Cisco enterprise networks.
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Topics

Physical Interface and Cabling Types

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