Posted by: Pdfprep
Post Date: January 16, 2021
Refer to the exhibits:
R1 and R2 are directly connected and IS-IS routing has been enabled between R1 and R2 R1 message periodically.
Based on this output, which statement is true?
A . IS-IS neighbor authentication is failing for Level 2 first and then for Level 1 PDUs
B . 1S-1S neighbor authentication is failing for Level 1 and Level 2 PDUs .
C . IS-IS neighbor authentication is failing for Level 1 PDUs only
D . IS-IS neighbor authentication is failing for Level 2 PDUs only.
Answer: C
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