Networking Concepts第 18 / 100 题
Which IEEE standard defines VLAN tagging on Ethernet trunk links?
a.802.1Q
b.802.3af
c.802.11ac
d.802.1X
解析
IEEE 802.1Q defines the frame tagging method used to carry multiple VLANs across a trunk link. 802.3af covers PoE, 802.11ac is Wi-Fi, and 802.1X is port-based access control. The 802.1Q tag adds a 4-byte field to the Ethernet frame.
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