Which Two Descriptions Are Not Correct About IS-IS? (Choose Two

Multiple Choice

Which two descriptions are not correct about IS-IS? (Choose two.)

A) ISIS pads each hello to a full MTU and can detect MTU mismatches between neighbors.
B) With the exception of point-to-point, IS-IS treats all networks and interfaces as broadcast.
C) In IS-IS, setting an overload bit will cause traffic to be black-holed.
D) IS-IS allows NSSA-like behavior via Level 2 to Level 1 route leaking.