Understanding VLAN Frame Tagging — ISL, DTP, and IEEE 802.1Q Explained
Learn how VLAN frame tagging works and why it’s essential for multi-switch networks. Understand ISL, DTP, and IEEE 802.1Q tagging protocols with easy explanations, real examples, and Cisco configuration commands. Perfect for network engineers and CCNA learners. When VLANs span across multiple switches, the switches need a way to identify which VLAN each Ethernet frame … Read more