Which authentication method secures IS-IS hello, link-state, and sequence number PDUs?
A.
Level authentication
B.
Interface authentication
C.
Area authentication
D.
Domain authentication
Explanation:
Which authentication method secures IS-IS hello, link-state, and sequence number PDUs?
Which authentication method secures IS-IS hello, link-state, and sequence number PDUs?
http://inetzeroblog.com/isis-training-and-junos-configuratio/
A is correct
ISIS authentication:
Junos allows a per level authentication and a per PDU authentication. The ISIS authentication uses a TLV (TLV 10) to conveys either a Simple Password in plain-text or a digest message (HMAC MD5). When the TLV is present within a PDU: IIH, CSNP, PSNP, LSP a router has to check the simple password or the message integrity (with the HMAC) before it takes into account the PDU.
See config of isis-interface-level-authentication here
https://www.juniper.net/techpubs/en_US/junos14.2/information-products/topic-collections/junos-xml-ref-oper/index.html?jd0e840095.html