Virtual Private LAN Service (VPLS) Label Distribution and Multihoming JN0-664 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the primary role of label distribution in a VPLS network?

   • ATo establish and maintain pseudowires between provider edge devices
   • BTo authenticate customer devices
   • CTo route IP packets between customer sites
   • DTo assign IP addresses to customer interfaces
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   In a multihomed VPLS, what is the role of the designated forwarder in loop prevention?

   • AIt uses STP to prevent loops
   • BIt blocks all traffic to the customer site
   • CIt encrypts traffic to prevent loops
   • DIt ensures that only one PE forwards traffic to the customer site
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   Which mechanism is used in VPLS to prevent loops between PE devices?

   • ASpanning Tree Protocol
   • BBGP route reflection
   • CSplit horizon
   • DOSPF
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   In LDP-based VPLS multihoming, how is redundancy typically provided?

   • ABy using BGP route reflectors
   • BBy using multiple route distinguishers
   • CBy using multiple VPLS IDs
   • DBy using active and standby pseudowires
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A provider is using LDP-based VPLS with a customer site multihomed to two PEs. The provider wants to ensure that only one PE forwards traffic from the site at a time, and that the backup PE takes over if the primary fails. What must be configured on the PEs to achieve this?

   • ABFD on the customer edge router to detect failures
   • BA designated forwarder election with a higher priority on the primary PE
   • CSplit horizon on the primary PE only
   • DActive/standby pseudowires with the primary PE configured as active
   Reveal Solution Discussion Select an answer first