642-889 Latest Exam (Aug 2018)

[Free] 2018(Aug) Dumps4cert Cisco 642-889 Dumps with VCE and PDF Download 51-60

August 19, 2018

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Implementing Cisco Service Provider Next-Generation Egde Network Services

Question No: 51

When implementing VPLS on Cisco routers, which data structure resembles a virtual switch and is used for learning the MAC addresses?

  1. VRF

  2. VFI

  3. SVI

  4. BVI

Answer: B

Question No: 52

Which MP-BGP address family must be configured to use VPLS autodiscovery in a Cisco IOS XR router?

  1. address-family l2vpn vpls-vpws

  2. address-family vpnv4 unicast

  3. address-family ipv4 mdt

  4. address-family ipv4 tunnel

  5. address-family vpls vfi

Answer: A Explanation:


Question No: 53

Refer to the exhibit.

Dumps4Cert 2018 PDF and VCE

Which two descriptions outline the traffic flow among the three sites? (Choose two.)

  1. The MNL site communicates with the XYZ and ABC sites.

  2. The XYZ and ABC sites communicate using the default route that points to the MNL site.

  3. XYZ sees the MNL and ABC routes.

  4. ABC sees the MNL and XYZ routes.

  5. The MNL site acts as a central site for the ABC and XYZ sites.

Answer: A,E

Question No: 54

Which three commands represent valid QoS classifiers of traffic in case of an EoMPLS circuit? (Choose three.)

  1. match cos

  2. match mpls experimental

  3. match qos-group

  4. match fr-de

  5. match protocol

  6. match ip address prefix-list

  7. match tag

Answer: A,B,C

Question No: 55

Which method can be used to discover targeted LDP neighbors dynamically when configuring VPLS between PE routers?

  1. BGP autodiscovery

  2. VPLS peers under the VFI

  3. VPWS

  4. BGP

Answer: A

Question No: 56

What is the purpose of the route distinguisher in a service provider network?

  1. to identify which prefixes should be imported

  2. to identify customer local prefixes

  3. to identify customer global prefixes

  4. to identify which prefixes should be exported from BGP

Answer: C

Question No: 57

Which Cisco IOS XR BGP configuration command is required to enable MP-BGP to carry IPv6 VPN routes?

  1. address-family ipv4 unicast

  2. address-family ipv6 unicast

  3. address-family vpnv4 unicast

  4. address-family vpnv6 unicast

Answer: D Explanation:

http://www.cisco.com/en/US/tech/tk872/technologies_configuration_example09186a0080b 3e11d.shtml

Question No: 58

Which Layer 2 encapsulations can AToM solution support with interworking IP feature enable?

  1. Ethernet to ATM AAL5

  2. ATM AAL5 to Frame Relay

  3. PPP to Frame Relay

  4. multipoint PPP to Frame Relay

Answer: A

Question No: 59

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

  1. E-Tree

  2. E-LAN

  3. E-Line

  4. E-Interworking

Answer: C Explanation:

  • 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: 60 DRAG DROP

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