Nokia IS-IS Routing Protocol Practice Questions - Nokia IS-IS Routing Protocol (4A0-112) Exam

IS-IS PDUs are encapsulated directly inside which layer of the protocol stack?

Inside IP packets, like OSPF Inside TCP segments on a well-known port Directly in the data link layer (no IP header) Inside UDP datagrams on port 520

Correct Answer:

Directly in the data link layer (no IP header)

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