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（2） TRUNK: The TRUNK port can be added in multiple VLANs, and the egress rule of the port is TAG. The TRUNK port is generally used to connect the cascaded network devices for it can receive and forward the packets of multiple VLANs. When the packets are forwarded by the TRUNK port, its VLAN tag will not be changed.

（3） GENERAL: The GENERAL port can be added in multiple VLANs and set various egress rules according to the different VLANs. The default egress rule is UNTAG. The PVID can be set as the VID number of any VLAN the port belongs to.

PVID

PVID (Port VLAN ID) is the default VID of the port. When the switch receives an untagged packet, it will add a VLAN tag to the packet according to the PVID of its received port and forward the packets.

When creating VLANs, the PVID of each port, indicating the default VLAN to which the port belongs, is an important parameter with the following two purposes:

（1） When the switch receives an untagged packet, it will add a VLAN tag to the packet according to the PVID of its received port

（2） PVID determines the default broadcast domain of the port, i.e. when the port receives UL packets or broadcast packets, the port will broadcast the packets in its default VLAN.

Different packets, tagged or untagged, will be processed in different ways, after being received by ports of different link types, which is illustrated in the following table.

			Receiving Packets
Port Type									Forwarding Packets
Port Type	Untagged Packets				Tagged Packets				Forwarding Packets
	Untagged Packets				Tagged Packets

					If the VID of packet is
					the same as the PVID
					of the port, the packet			The	packet	will	be
Access					will be received.			The	packet	will	be
Access					If the VID of packet is			forwarded after removing its
					If the VID of packet is			VLAN tag.
					not the same as the
					PVID of the port, the
	When	untagged			packet will be dropped.
	When	untagged
	packets			are
	received,	the		port				The	packet	will	be
Trunk	will add	the	default					forwarded with		its current
	VLAN tag,		i.e.	the				VLAN tag.
	PVID of the ingress				If the VID of packet is
	PVID of the ingress				If the VID of packet is
	port, to the packets.				allowed by the port, the			If the egress rule of port is
					packet will be received.			TAG, the packet will be
					If the VID of packet is			forwarded with		its current
					forbidden by	the	port,	VLAN tag.
General					the packet	will	be	If the egress rule of port is
					dropped.			UNTAG, the packet will be
								UNTAG, the packet will be
								forwarded after removing its
								VLAN tag.

Table 6-1 Relationship between Port Types and VLAN Packets Processing

TL-SG3424P specifications

The TP-Link TL-SG3424P is a high-performance managed switch designed to meet the needs of small to medium-sized businesses. Offering 24 Gigabit Ethernet ports, this device is an ideal solution for improving network efficiency and ensuring seamless data transfer across multiple devices. The switch not only facilitates connectivity but also provides robust management features to enhance the performance and security of your network.

One of the standout features of the TL-SG3424P is its Power over Ethernet (PoE) capability, which allows it to deliver power and data over the same Ethernet cable. This feature is particularly beneficial for deploying devices such as IP cameras, VoIP phones, and wireless access points without the need for additional power sources. With a total power budget of 250W, the TL-SG3424P can support a diverse range of PoE devices, providing convenience and flexibility in deployment.

In terms of management, the TL-SG3424P offers a user-friendly web interface, allowing network administrators to configure and monitor the switch with ease. It supports advanced Layer 2 features, including VLANs, Quality of Service (QoS), and Link Aggregation. These features enhance network performance by optimizing traffic flow and prioritizing essential applications. The switch also includes comprehensive security features, such as Port Security and Access Control Lists (ACL), which help protect against unauthorized access and ensure data integrity.

The build quality of the TL-SG3424P is robust, designed to handle demanding network environments. It includes a fanless design, which ensures silent operation, making it suitable for office environments where noise can be a distraction. The metal chassis is durable and built for longevity, ensuring that the device will withstand rigorous usage over time.

Furthermore, the TL-SG3424P supports SNMP (Simple Network Management Protocol), allowing for centralized network monitoring and management. This makes it easier for IT teams to keep track of network health and performance, enabling timely interventions when necessary.

In conclusion, the TP-Link TL-SG3424P is a versatile and powerful managed switch that combines PoE capabilities with advanced network management features, making it a perfect choice for businesses looking to upgrade their network infrastructure. With its reliable performance and robust features, it provides an excellent solution for enhancing productivity and connectivity in any office setting.

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Models: TL-SG3424P

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TL-SG3424P specifications