Which two statements about the IS-IS routing protocol are true? (Choose two.) Select 2
response(s).

A.
IS-IS is capable of supporting IPv4 and IPv6.

B.
IS-IS is only capable of supporting IPv4 and CLNS.

C.
IS-IS routers use ES-IS hellos (ESH) to establish and to maintain neighbor relationships.

D.
IS-IS routers run the Bellman-Ford algorithm against their LSDBs to pick the best paths.

E.
Level 1 routers learn about paths within the area of which they are a part.

F.
Level 2 routers learn about paths both within areas and between areas.