Questions and Answers
What does topology refer to in networking?
The physical layout of computers, cables, and resources as well as how those components communicate.
Which of the following is NOT a physical topology?
A bus topology has high fault tolerance.
False
In what way do computers communicate in a logical bus topology?
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What is signal propagation in networking?
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What happens to a signal at the end of a cable?
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Which logical topology is most commonly implemented as a physical star?
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What is token passing in a logical ring topology?
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A ring topology allows random access for data transmission.
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Match the following topologies with their descriptions:
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Study Notes
Examining the Basics of a Network Layout
- Topology refers to the physical layout and communication method of network components, including computers and cables.
- Physical topology deals with cabling arrangement, while logical topology pertains to the data path across the network.
- The choice of topology significantly influences network performance, growth, and equipment selection.
Understanding Standard Topologies
- Network designs generally utilize three main physical topologies:
- Bus Topology: Computers connected along a single cable segment.
- Star Topology: Computers connect via a central hub.
- Ring Topology: Computers form a closed loop.
- Logical topologies depict data travel paths and can vary from physical topologies; for example, logical bus topologies are often implemented as physical stars.
Communication on the Bus Topology
- The bus topology offers low fault tolerance due to its single-cable structure, where a failure can disrupt the entire network.
Signal Propagation
- Communication in bus topologies involves computers sending signals as electrical pulses traveling in all cable directions.
- Signals continue until they weaken or are absorbed by a device, a process known as signal propagation.
Logical Bus Topology
- A logical bus topology allows all computers to address and transmit data collectively, with only the intended destination accepting the data.
- Performance can suffer due to shared transmission time among all units on the network.
Physical Ring Topology
- In a ring topology, data travels sequentially from one node to the next until reaching its destination.
- Token passing is a common method for data transmission in this structure.
Logical Ring Topology
- Modern logical ring topologies often utilize smart hubs that can detect and remove failed computers from the network ring automatically.
- This design effectively shares network resources among devices, ensuring fair access.
Physical Star Topology
- The star topology enables ease of management and troubleshooting, as failures in one cable do not affect the entire network.
- Logical bus and ring topologies can both be implemented using a physical star configuration, offering versatility in network design.
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Description
Test your knowledge on the fundamentals of network design, including various topologies and layouts. This quiz covers essential concepts such as hubs, switches, and the construction of network layouts.
