I'm reading through the CCNP BSCI official Prep Guide (Latest Version) and it states that the type 4 LSA is produced by the ASBR. The CCNP BSCI Exam Cert Guide (Self-Study 3rd edition) states that the type 4 LSA is sent from the ABR to the ASBR. So where is the type 4 LSA generated and TO where is it sent? I have two official exam prep books written by the same author (Clare Gough) that contradict each other. According to the standard both type 3 and 4 LSAs are originated at the ABR (RFC 2328 - 12.1.4).