Network Topology: Why is a SWITCH a Physical Star but a Logical Bus on an Ethernet Network?
In an Ethernet network, a switch acts as a physical star and a logical bus. This means that each device is connected to the switch via a dedicated physical link, forming a star topology. However, from a logical perspective, the switch broadcasts data to all connected devices at once, creating a bus topology.
Physical Star Topology:
- Each device is physically connected to the switch through a dedicated port.
- Data packets are sent directly from one device to the switch, then to the intended recipient.
- This topology reduces collisions and improves network performance.
Logical Bus Topology:
- When a switch receives data from one device, it broadcasts it to all other connected devices.
- Each device listens for its own address and receives the data if it matches.
- This broadcasting method allows multiple devices to share the same communication medium.
The switch's ability to act as both a physical star and a logical bus provides several benefits:
- Increased bandwidth: The star topology ensures that each device has dedicated access to the switch.
- Reduced collisions: The logical bus topology allows multiple devices to transmit simultaneously without collisions.
- Enhanced flexibility: Devices can be added or removed from the network without affecting other devices.
Related Questions:
- What is the difference between a physical star and a logical bus topology?
- Physical star: each device has a dedicated link to the switch; Logical bus: the switch broadcasts data to all devices.
- Why is a switch both a physical star and a logical bus?
- To provide increased bandwidth, reduce collisions, and enhance network flexibility.
- How does a switch manage data traffic?
- It receives data from one device and broadcasts it to all connected devices.
- What are the benefits of using a switch in an Ethernet network?
- Reduced collisions, increased bandwidth, and enhanced flexibility.
- What are the limitations of a switch-based Ethernet network?
- Can be expensive, requires cabling, and may experience bottlenecks with high traffic.
Related Hot Sale Products:
- Cisco Catalyst 9200 Series Switch
- Netgear ProSafe GS724T Switch
- TP-Link TL-SG108 Switch
- D-Link DGS-1008P Switch
- Ubiquiti UniFi Switch Lite 8 POE
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