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Basic concepts and core functions of switches
Release time:
2021-11-12
The switch is the core device in network communication, and the device is interconnected through the forwarding of electrical signals or optical signals. Its core features include:
The switch is the core device in network communication, and the device is interconnected through the forwarding of electrical signals or optical signals. Its core features include:
- Data forwarding: Packets are accurately delivered to the destination port based on the MAC address table to avoid broadcast storms.
- Flow control: Spanning Tree Protocol (STP) eliminates network loops to ensure unique data transmission paths.
- Port isolation: Divides the physical network into multiple logical virtual local area networks (VLANs) to improve security and efficiency.
- Bandwidth optimization: Each port is assigned an independent conflict domain to avoid congestion caused by shared bandwidth.
Modern switches have supported full-duplex communication to achieve bidirectional synchronous data transmission at a theoretical rate of gigabit or even 10 gigabit. Its application scenarios cover homes, enterprises, and data centers, and become the infrastructure for building local area networks.
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