Draytek Vigor2620 LTE Series User Manual page 280

Available settings are explained as follows:
Item
Activate
Setup Query Server
Setup Test Server
Cache
268
Description
Click it to access into MyVigor for activating WCF service.
It is recommended for you to use the default setting,
auto-selected. You need to specify a server for categorize
searching when you type URL in browser based on the web
content filter profile.
Find more - Click it to open http://myvigor.draytek.com for
searching another qualified and suitable server.
It is recommended for you to use the default setting,
auto-selected.
Find more - Click it to open http://myvigor.draytek.com for
searching another qualified and suitable server.
None – the router will check the URL that the user wants to
access via WCF precisely, however, the processing rate is
normal. Such item can provide the most accurate URL
matching.
L1 – the router will check the URL that the user wants to
access via WCF. If the URL has been accessed previously, it
will be stored in the router to be accessed quickly if
required. Such item can provide accurate URL matching with
faster rate.
L2 – the router will check the URL that the user wants to
access via WCF. If the data has been accessed previously, the
IP addresses of source and destination IDs will be memorized
for a short time (about 1 second) in the router. When the
Vigor2620 Series User's Guide