(Because VLAN technology is closely related to local area network technology, before introducing VLAN, we must first understand the relevant knowledge of local area network. A local area network (LAN) is usually defined as a single broadcast domain, mainly using network devices such as hubs, bridges, or switches to connect all nodes/points within the same network segment. The network nodes/points in the same local area network can communicate directly without going through the network router; while the communication between devices in different LAN segments must go through the network router. …………………………………………)
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