Default route or full routing table?

When a company/enterprise is signing up with an ISP for internet access, they are able to connect in many different ways, but we are going to go over a couple of the popular methods. NOTE: This is a brief overview to answer this one question, BGP is very powerful and programmable, so we won’t touch on most of its features. If the company has its own ASN (Autonomous System Number) they can connect to an ISP and advertise out this number through BGP with the IP space (prefixes) they own.