question about BGP default routing

[kch670 at eecs.northwestern.edu (Kai Chen)]

Hi all I have a question:

I see very few prefixes in a routing table and combining the prefixes
does not cover addresses space, for example,  {78.41.184.0/21,
91.103.239.0/24, 91.103.232.0/22, 82.138.64.0/23, 91.103.232.0/21,
77.95.71.0/24} are all prefixes I observed from a BGP speaking router,
I am just asking is this router using a default routing for all the
other destinations?

Thanks a lot