LSA Type 1: Router LSA LSA Type 2: Network LSA LSA Type 3: Summary LSA LSA Type 4: Summary ASBR LSA LSA Type 5: Autonomous system external LSA LSA Type 6: Multicast OSPF LSA LSA Type 7: Not-so-stubby area LSA LSA Type 8: External attribute LSA for BGP https://networklessons.com/ospf/ospf-lsa-types-explained D. Type 4

Type 1 - Router LSA - by all routers inside the area Within the area Type 2 - Network LSA - DR (Designated router) - Within the area Type 3 - Summary LSA - ABR (Area Border Router) - Within the network Type 4 - ASBR Summary - ABR (Area Border Router) - Within the network Type 5 - AS-external LSA - ASBR (Autonomous System Boundary Router) - Within the network Type 6 - Group Membership LSA - Type 7 - NSSA External LSA - ASBR (Autonomous System Boundary Router) - Intra-area Type 8 - Link-local LSA (OSPFv3) - by all routers - within the area Link Type 9 - Link-local opaque (OSPFv2) - Link-local - Type 9 - Intra-Area-Prefix (OSPFv3) - Link-local Type 10 - Area-local opaque - Area-local Type 11 - Autonomous System opaque - Within the network

https://www.router-switch.com/faq/6-types-of-ospf-lsa.html

D for sure! LSA 4 ==> These are LSA's that announce the presence of an ASBR to other areas

Type 3 is for the ABR and Type 4 is for the ASBR