- 802.1Q.
- 1, 4094.
- Switch spoofing, double tagging.
- 7.
- It increases the number of possible VLANs (16,752,649 with a single level of nesting, with even more VLANs possible if there are multiple levels of nesting).
- Increased throughput, redundancy.
- None (we have to create rules to allow access from VLANs to other networks ourselves).
- Trunk ports and VLAN ports.
- PVID.
- Static, Dynamic Trunking Protocol (DTP), VLAN Trunking Protocol (VTP).
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