Asterisk Info shows a 'default' queue as well as one created by hand

I like the way queues are working (especially, ‘queue no answer’ option).

Is it normal to get stats like this in Asterisk Info :

default has 0 calls (max unlimited) in ‘ringall’ strategy (0s holdtime, 0s talktime), W:0, C:0, A:0, SL:0.0% within 0s
No Members
No Callers

200 has 0 calls (max 3) in ‘ringall’ strategy (4s holdtime, 119s talktime), W:0, C:11, A:7, SL:100.0% within 30s
[here lists my extensions]
No Callers

I.e. where is the default queue defined ?