Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 442

What is the term used when it causes the packets to lose their MPLS labels including the VPN in-formation that lies in the inner MPLS Label i.e. if a packet goes through an untagged interface, the VPN information is lost and VPN sites lose connectivity?

Answer options

• A. Pseudowire
• B. Black Hole
• C. Traffic Engineering
• D. Active Network Abstraction

Correct answer: B

Explanation

The correct answer is B, Black Hole, as it refers to the scenario where packets are lost due to label removal, causing connectivity issues. A, Pseudowire, refers to a method of encapsulating packets, while C, Traffic Engineering, involves optimizing data flow, and D, Active Network Abstraction, relates to network management techniques, none of which directly address the loss of VPN connectivity due to label loss.