In a switched environment, what does the IEEE 802.1Q standard describe?
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A. B. C. D. E.B
The IEEE 802.1Q standard defines a method for tagging Ethernet frames with virtual LAN (VLAN) membership information. It enables VLAN trunking between multiple switches and routers, which allows a single physical network infrastructure to be divided into multiple virtual networks, each with its own broadcast domain.
This means that by using VLAN tagging, network administrators can create multiple logical networks that operate independently of each other, improving network security, scalability, and manageability. VLAN tagging also enables network administrators to implement policies and protocols that are specific to each VLAN, such as Quality of Service (QoS) settings, access controls, and routing rules.
Therefore, option B, "a method of VLAN trunking," is the correct answer to this question. The other options are incorrect as they describe different concepts related to network operations, such as VTP operation (option A), wireless LAN communication (option C), root bridge selection (option D), and VLAN pruning (option E).