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1. Products
2. Technology

1. End-of-Sale / End-of-Life

1. EtherChannel
2. Ethernet
3. Fiber Distributed/Copper Distributed Data Interface (FDDI/CDDI)
4. LAN Quality of Service
5. LAN Security
6. Layer-Three Switching and Forwarding
7. Multicast
8. Port Monitoring
9. Spanning Tree Protocol
10. Switch Redundancy and Management
11. VLAN Trunking Protocols
12. Virtual LANs/VLAN Trunking Protocol (VLANs/VTP)

1. Additional & Legacy Protocols

1. All Spanning Tree Protocol
2. Common Spanning Tree (CST)
3. Multiple Instance STP (MISTP) / 802.1s
4. Per VLAN Spanning Tree (PVST)
5. Per VLAN Spanning Tree Plus (PVST+)
6. Rapid STP (RSTP) / 802.1w
7. Spanning Tree Protocol (STP) / 802.1D

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