A network is configured on a Bus topology. Which of the following conditions could cause a network failure? Each correct answer represents a complete solution. Choose all that apply.

Question

Options

• AA break in a network cable
• B75 ohm terminators at open ends
• CA powered off workstation
• DAn open-ended cable without terminators

• A
  74% (26)
• C
  26% (9)

Explanation

In a bus topology, all devices share a single continuous cable, and signals must be properly absorbed at both ends. A (cable break) physically splits the bus into two isolated segments, halting all communication. D (open-ended cable without terminators) causes signal reflections that corrupt data for all devices on the bus. B (75-ohm terminators) is wrong because bus networks (like 10BASE2 Ethernet) require 50-ohm terminators - using the wrong impedance still produces signal reflections and network failure.

C is incorrect because in a bus topology, workstations connect via passive T-connectors; the cable runs through the connector regardless of whether the device is powered, so the bus remains intact.

Memory tip: Think of a bus like a highway with walls at each end - any hole in the road (cable break) or missing/wrong wall (terminator issue) breaks traffic flow, but a parked car (powered-off workstation) just sits at its exit and doesn't block anyone else.

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