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What are Virtual LAN and VLAN?
A technology that builds logical segments beyond the physical constraints of L2 switches . This is achieved by assigning a logical number to each physical port of the L2 switch . Although logical, the segments are separated, so for example, a broadcast packet flowing in one logical segment does not reach the other logical segment. There are two types of VLAN technology:
- A port VLAN that allows only one VLAN ID to be specified for one physical port
- Tag VLAN that allows you to specify multiple VLAN IDs for one physical port
Port VLAN
A technology that specifies only one VLAN ID for one physical port . Even if they are connected to a single physical L2 switch, the segments created by the VLAN are virtually isolated. Therefore, in order to communicate between these segments, it is necessary to go through layer 3 as in the physical segment. Therefore, if this physical switch is an L3 switch (L2 switch with a routing function), communication between these logical segments can be performed without other network equipment.
