Which two statements about the IS －IS routing protocol are true?()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 re

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Which two statements about the IS －IS routing protocol are true?()

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.

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Which two statements about the IS －IS routing protocol are true?()

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