A totally stubby OSPF area blocks Type 3, Type 4, and Type 5 LSAs while allowing a default summary route into the area. In OSPF, Type 3 LSAs are interarea summary LSAs, Type 4 LSAs describe reachability to ASBRs, and Type 5 LSAs carry external routes. A normal area accepts all of these LSA types. A standard stub area blocks Type 5 external LSAs and normally Type 4 ASBR summaries, but it still allows Type 3 interarea summaries. An NSSA blocks normal Type 5 external LSAs but allows Type 7 LSAs for locally redistributed external routes. A totally stubby area is more restrictive: the ABR suppresses interarea summaries and external routing detail, then injects a default route so routers inside the area still have reachability outside the area. This design reduces LSDB size, memory consumption, and SPF processing on low-end routers in remote areas. Therefore, the OSPF area type that blocks Type 3, 4, and 5 LSAs but allows a default summary route is a totally stubby area.

Explanation:
vBond - facilitates Cisco Catalyst SD-WAN fabric onboarding
vManage - interface to monitor, configure, and maintain Cisco Catalyst SD-WAN devices vEdge - provides secure data plane connectivity between sites vSmart - acts as a route reflector to distribute route and policy information

Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/ b_166_programmability_cg_chapter_01011.html
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/169/b_169_programmability_cg/ configuring_yang_datamodel.html