Podcast
Questions and Answers
Collision detection is turned on in half-duplex mode.
Collision detection is turned on in half-duplex mode.
True (A)
Which of the following physical topologies are used with Ethernet networks? (Select two.)
Which of the following physical topologies are used with Ethernet networks? (Select two.)
- Mesh
- Bus (correct)
- Ring
- Star (correct)
Which Gigabit Ethernet standard can support long network segments up to a maximum of 5 km when used with single-mode fiber optic cable?
Which Gigabit Ethernet standard can support long network segments up to a maximum of 5 km when used with single-mode fiber optic cable?
1000BaseLX
Which Gigabit Ethernet standard uses multimode fiber optic cabling and supports network segments up to a maximum of 550 meters long?
Which Gigabit Ethernet standard uses multimode fiber optic cabling and supports network segments up to a maximum of 550 meters long?
What type of cabling do Ethernet 100Base-FX networks use?
What type of cabling do Ethernet 100Base-FX networks use?
What is the maximum cable segment length allowed for 100Base-FX half-duplex multimode cable?
What is the maximum cable segment length allowed for 100Base-FX half-duplex multimode cable?
What is the maximum cable segment length allowed for Fast Ethernet using twisted-pair cables?
What is the maximum cable segment length allowed for Fast Ethernet using twisted-pair cables?
Which Ethernet standard meets the design requirements for a high-speed network backbone over a distance of around 300 meters? (Choose two.)
Which Ethernet standard meets the design requirements for a high-speed network backbone over a distance of around 300 meters? (Choose two.)
Which standard and cable type would you choose for very long distances using fiber optic cables? (Select two.)
Which standard and cable type would you choose for very long distances using fiber optic cables? (Select two.)
What are the minimum requirements for implementing 10 Gbps Ethernet over a distance of 1 kilometer or greater? (Select two.)
What are the minimum requirements for implementing 10 Gbps Ethernet over a distance of 1 kilometer or greater? (Select two.)
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Study Notes
Half-Duplex Mode
- Half-duplex mode requires collision detection to be activated.
Ethernet Network Topologies
- Ethernet networks can utilize bus and star physical topologies.
- Hubs can be cascaded to create a tree topology.
Gigabit Ethernet Standards
- 1000BaseLX supports long segments (up to 5 km) with single-mode fiber optic cable.
- 1000Base-SX utilizes multimode fiber optic cabling, maximum segment length of 550 meters, with specific cabling requirements for optimal length.
- 1000Base-FX supports up to 550 meters with multimode and up to 10 kilometers with single-mode cabling.
Cable Types for Ethernet Standards
- 100BaseFX networks operate using fiber optic cabling.
- 100Base-FX half-duplex multimode cable has a maximum segment length of 412 meters.
- 100Base-TX (Fast Ethernet) twisted-pair cables support a maximum segment length of 100 meters.
Designing Ethernet Networks
- For distance requirements around 300 meters using existing multimode fiber, consider 1000Base-SX and 10GBase-SR standards.
- 10Base-FL is slower and not suitable for high-speed designs; 10GBase-T and 1000Base-T require copper wiring.
Long-Distance Ethernet Implementation
- Implement long-distance fiber optic networks with 1000BaseLX and single-mode fiber for maximum distance capabilities.
- For 10 Gbps speeds over distances of 1 kilometer or more, utilize 10GBaseLR standards with single-mode fiber.
Summary of Ethernet Standards and Cable Capacities
- Multimode fiber is more cost-effective but limited in distance compared to single-mode fiber.
- 10GBaseSR supports distances of up to 300 meters; 10GBaseER extends capabilities up to 40 kilometers using single-mode fiber.
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