Which three characteristics apply to IS-IS but not to OSPF? (Choose three.)
A.
encapsulates PDUs directly into a data-link frame
B.
uses a default IOS metric of 10 on each interface
C.
uses an on-demand circuit to reduce the hello and LSA flooding across switched WAN links,
such as ISDN
D.
runs PRC (Partial Route Calculations) to calculate IPreachability information
E.
uses stubby areas to improve network scalability
F.
uses a DIS and a backup DIS to present thepsuedo-node on the LAN