Draytek Vigor2926L User Manual page 699

Port-based mode
Tag-based mode
To deploy a guest network, which serves your guests the internet accessibility, but the
traffics have to be isolated from your private network due to the security considerations,
it can be done by above settings. However, a switch support VLAN function is need if VLAN
Tag enabled.

Triple Play (Multi-WAN)
NAT mode with VLAN
Following settings, the set-top box (STB) is able to attach with any LAN port. Video
streaming which your ISP provided will be played on your monitor.
Vigor2926 Series User's Guide 683