Port-based VLAN is a grouping based on physical ports on the Switch.  Each port is assigned to a specific group and if a user is moved into a different port on the Switch that is not part of the VLAN group they will not be allowed to communicate with the initial group. 

Tagged based VLAN is slightly harder to configure; however, the results are more beneficial.  By using tagged-based VLAN, groups are assigned tags and therefore ports are no longer specifically assigned.  Someone could be plugged into port one then plug into port 15 and still be a part of the same VLAN group due to the tagging of the group.

TEG-424WS supports IEEE 802.1Q tagged based VLAN.