Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) Practice Mode

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose B1

  https://www.cisco.com/en/US/technologies/tk648/tk365/tk480/technologies_white_paper0900aecd80244005.html

• Chose C1

  For Layer 2 failure detection, Cisco supports mechanisms such as: Layer 2 VPNs (L2VPNs) Ethernet Fault Detection (EFD) Xconnect as a Client of BFD So C is correct, Layer 1 & 3

• Chose D1

  Technically it's a L3 protocol and is has no L1/L2 awareness. It just checks for BFD packets from it's neighbor. So in technical sense B would be more correct. That said, I believe Cisco would prefer you to say D as it is the whole reason why it's beneficial. It's the selling point if you will. Generally speaking this is how it's described. So the engineer would say B, the salesman will say D. Go with D, it's the safer answer