The functions of Trunk ports: 1. Transmit data of multiple VLANs: Trunk ports can transmit data of multiple VLANs at the same time; 2. Implement VLAN expansion: Trunk ports can connect multiple switches to realize VLAN Expansion; 3. Transmit data across switches: Trunk ports can transmit data across different switches; 4. Provide bandwidth aggregation: Trunk ports can aggregate multiple physical links into one logical link, providing greater bandwidth; 5. Simplification Configuration management and more.
Trunk port has the following main functions in the switch:
Transmit data of multiple VLANs: Trunk The port can transmit data of multiple VLANs at the same time. By using VLAN tags, Trunk ports can distinguish data frames from different VLANs and transmit them between switches.
Realize VLAN expansion: Trunk ports can connect multiple switches to achieve VLAN expansion. Through Trunk ports, different VLANs on different switches can be connected together to form an extended VLAN network.
Transmit data across switches: Trunk ports can transmit data across different switches. When data needs to be transmitted from one switch to another, the trunk port can tag the data frame with a VLAN tag and transmit it to the destination switch.
Provides bandwidth aggregation: Trunk ports can aggregate multiple physical links into one logical link to provide greater bandwidth. By binding multiple physical links to a Trunk port, the capacity and speed of data transmission can be increased.
Simplified configuration management: By using Trunk ports, the configuration and management of multiple VLANs can be centralized, simplifying network configuration and management. The administrator only needs to perform relevant configurations on the Trunk port to realize the transmission and management of multiple VLANs.
It should be noted that the Trunk port needs to be correctly configured and negotiated between switches to ensure the consistency of VLAN tags and the correct transmission of data. In addition, Trunk ports usually use specific protocols, such as the 802.1Q protocol, to realize the transmission and resolution of VLAN tags. Proper configuration and use of Trunk ports can realize cross-VLAN data transmission and management, improving network flexibility and scalability.
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