Actual Exam Question For Cisco 642-889

By | January 19, 2020

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Question No. 1

When implementing H-VPLS with QinQ access on Cisco Metro Ethernet switches, which two commands enable the QinQ tagging? (Choose two.)

Answer: C, E

Question No. 2

Which option is the correct command to define an interface as Layer 2 on the Cisco ASR 9000?

Answer: A

Question No. 3

What is an advantage of using the Cisco EVC infrastructure to implement carrier-class Ethernet services that are not available on non-EVC-capable platforms?

Answer: D

Question No. 4

VPWS/EoMPLS offers which type of Ethernet services as defined by the MEF?

Answer: C

* E-Line is based on a point-to-point Ethernet Virtual Connection. Two E-Line services are defined:

— Ethernet Private Line (EPL): A very simple and basic point-to-point service characterized by low frame delay, frame delay variation, and frame loss ratio. No service multiplexing is allowed, and other than a committed information rate (CIR) no class of service (CoS) (Bandwidth Profiling) is allowed.

— Ethernet Virtual Private Line (EVPL): A point-to-point service wherein service multiplexing (more than one Ethernet Virtual Connection) is allowed. The individual Ethernet Virtual Circuits can be defined with a rich set of Bandwidth Profiles and Layer 2 Control Protocol Processing methods as defined by the Metro Ethernet Forum.

Question No. 5

Which two MPLS QoS models described by RFC3270 are used for CE-PE QoS implementation? (Choose two.)

Answer: B, C

Question No. 6

Refer to the exhibit.

An engineer is configuring an eBGP neighbor between PE-A and CE-A ( The

engineer notices that the prefix shown in the BGP table is not being received at CE-A_ Which command successfully passes the routes?

Answer: B

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